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#include<iostream>
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using namespace std;
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class student
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{
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private:
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int rollno;
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char name[20];
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public:
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void read()
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{
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cout<<"\nEnter Rollno and Name:\n";
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cin>>rollno>>name;
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}
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void show()
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{
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cout<<"\nRollno = "<<rollno;
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cout<<"\nName = "<<name;
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}
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};
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class exam_internal : public student
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{
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protected:
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int sub1_marks;
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int sub2_marks;
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public:
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void read_marks()
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{
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cout<<"\nEnter Internal Marks of Subject 1 (MAX:40) :\n";
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cin>>sub1_marks;
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cout<<"\nEnter Internal Marks of Subject 2 (MAX:40) :\n";
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cin>>sub2_marks;
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}
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void display_marks()
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{
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cout<<"\nInternal Marks of Sub 1 = "<<sub1_marks;
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cout<<"\nInternal Marks of Sub 2 = "<<sub2_marks;
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}
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};
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class exam_external : public student
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{
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protected:
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int sub1_ext_marks;
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int sub2_ext_marks;
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public:
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void read_marks()
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{
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cout<<"\nEnter Internal Marks of Subject 1 (MAX:40) :\n";
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cin>>sub1_ext_marks;
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cout<<"\nEnter Internal Marks of Subject 2 (MAX:40) :\n";
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cin>>sub2_ext_marks;
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}
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void display_marks()
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{
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cout<<"\nExternal Marks of Sub 1 = "<<sub1_ext_marks;
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cout<<"\nExternal Marks of Sub 2 = "<<sub2_ext_marks;
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}
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};
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class result:public exam_internal, public exam_external
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{
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private:
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int total_marks;
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public:
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void cal_result()
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{
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total_marks = sub1_ext_marks+sub2_ext_marks+sub1_marks+sub2_marks;
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cout<<"Total Marks Obtained = "<<total_marks;
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}
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};
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int main()
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{
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result r1;
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cout<<"Enter student information :\n";
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r1.exam_internal::read();//call read() of student class
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cout<<"Enter marks of Internal Examination:\n";
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r1.exam_internal::read_marks(); //To resolve ambiguty
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cout<<"Enter marks of External Examination:\n";
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r1.exam_external::read_marks(); //To resolve ambiguty
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cout<<"\nDisplaying Student Details\n";
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r1.exam_internal::show(); //Calls show of student class
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r1.exam_internal::display_marks(); //To resolve ambiguty
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r1.exam_external::display_marks(); //To resolve ambiguty
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cout<<"\nCalculating and displaying result\n";
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r1.cal_result();
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return 0;
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}
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#include<iostream>
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using namespace std;
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class score
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{
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private:
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int val;
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public:
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score()
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{ val = 0; }
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void operator ++() //operator function defination
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{
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val=val+1;
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}
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int show(){
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return (val);
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}
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};
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int main()
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{
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score s1,s2;
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cout<<"\nInitial value of s1 object = "<<s1.show();
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cout<<"\nInitial value of s2 object = "<<s2.show();
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++s1; //operator function call
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++s1; //same as s1.operator++();
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++s2;
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cout<<"\nFinal value of s1 object = "<<s1.show();
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cout<<"\nFinal value of s2 object = "<<s2.show();
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return 0;
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}
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#include<iostream>
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using namespace std;
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class score
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{
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private:
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int val;
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public:
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score()
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{ val = 0; }
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score operator ++() //prefix overloaded operator function Eg. ++i
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{
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score temp;
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val=val+1;
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temp.val = val;
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return(temp);
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}
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score operator ++(int) //postfix overloaded operator function Eg. i++
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{
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score temp;
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temp.val = val;
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val=val+1;
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return(temp);
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}
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int show(){
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return (val);
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}
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};
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int main()
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{
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score s1,s2;
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cout<<"\nInitial value of s1 object = "<<s1.show();
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cout<<"\nInitial value of s2 object = "<<s2.show();
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s2 = ++s1;
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cout<<"\ns1 = "<<s1.show();
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cout<<"\nValue of s2 after prefix operation = "<<s2.show();
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s2 = s1++;
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cout<<"\ns1 = "<<s1.show();
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cout<<"\nValue of s2 after prefix operation = "<<s2.show();
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return 0;
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}
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#include<iostream>
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using namespace std;
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class complex
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{
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private:
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double real,img;
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public:
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complex()
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{ real=img=0; }
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void read()
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{
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cout<<"\nEnter real and imaginary parts: "<<endl;
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cin>>real>>img;
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}
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complex operator +(complex cc2) // Overload operator function t
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{
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complex temp;
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temp.real = real + cc2.real;
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temp.img = img + cc2.img;
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return temp;
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}
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complex operator -(complex cc2) // Overload operator function t
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{
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complex temp;
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temp.real = real - cc2.real;
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temp.img = img - cc2.img;
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return temp;
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}
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void show()
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{
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if(img>0)
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cout<<real<<"+"<<img<<"i"<<endl;
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else
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cout<<real<<img<<"i"<<endl;
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}
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};
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int main()
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{
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complex c1,c2,c3,c4;
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cout<<"Enter complex number c1 :";
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c1.read();
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cout<<"Enter complex number c2 :";
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c2.read();
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c3 = c1 + c2; //call to operator function +
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c4 = c1 - c2; //call to operator function -
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cout<<"\nAfter adding :\n";
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c3.show();
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cout<<"After subtracting :\n";
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c4.show();
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return 0;
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}
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#include<iostream>
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using namespace std;
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class dob
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{
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private:
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int dd,mm,yyyy;
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public:
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dob(int d, int m, int y)
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{
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dd=d; mm=m; yyyy=y;
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}
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void show()
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{
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cout<<"DOB = "<<dd<<"-"<<mm<<"-"<<yyyy<<"\n";
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}
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int operator ==(dob);
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};
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int dob::operator==(dob dd2) //overloading operator function defination
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{
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if((yyyy==dd2.yyyy) && (mm==dd2.mm) && (dd==dd2.dd))
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{
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return 1;
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}else
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{
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return 0;
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}
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}
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int main()
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{
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int dd1,mm1,yy1,dd2,mm2,yy2;
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cout<<"Enter date of birth 1 (Format : dd mm yyyy) :";
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cin>>dd1>>mm1>>yy1;
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dob d1(dd1,mm1,yy1);
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cout<<"Enter date of birth 2 (Format : dd mm yyyy) :";
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cin>>dd2>>mm2>>yy2;
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dob d2(dd2,mm2,yy2);
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d1.show();
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d2.show();
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if(d1==d2) // overloaded operator function call
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{
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cout<<"d1 and d2 are same DOB's";
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}else{
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cout<<"d1 and d2 have different DOB's";
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}
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return 0;
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}
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#include<iostream>
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#include<string.h>
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using namespace std;
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class strng
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{
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char st[20];
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public:
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strng() // Construtor with no paramenter
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{
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strcpy(st," ");
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}
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strng(char s[]) // Construtor with one paramenter
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{
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strcpy(st,s);
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}
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void show()
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{
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cout<<st;
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}strng operator +(strng); //declaration of overloaded operator function
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};
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strng strng::operator +(strng ss2)
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{
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strng temp; // create temporary object
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strcpy(temp.st,st); // copy string left object
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strcat(temp.st,ss2.st); // add string of right object
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return(temp);
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}
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int main()
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{
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char h[6] = "Happy";
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char d[8] = " Diwali";
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strng s1(h); // Uses one parameter construtor
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strng s2(d);
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strng s3; // Uses construtor with no parameter
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cout<<"Before concatenation \n";
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cout<<"s1 = ";
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s1.show();
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cout<<"\ts2 = ";
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s2.show();
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cout<<"\ts3 = ";
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s3.show();
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s3 = s1 +s2; // equivalent to s1.operator+(s2);
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cout<<"\nAfter Concatenation \n";
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s3.show();
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return 0;
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}
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#include<iostream>
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using namespace std;
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class score
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{
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private:
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int val;
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public:
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score()
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{ val = 0; }
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int show(){
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return (val);
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}
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friend score operator++(score &); // prefix
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friend score operator++(score & ,int); // postfix
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};
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score operator ++(score &temp) //prefix overloaded operator function Eg. ++i
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{
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temp.val=temp.val+1;
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return(temp);
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}
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score operator ++(score &temp,int) //postfix overloaded operator function Eg. i++
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{
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temp.val = temp.val;
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temp.val=temp.val+1;
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return(temp);
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}
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int main()
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{
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score s1,s2;
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cout<<"\nInitial value of s1 object = "<<s1.show();
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cout<<"\nInitial value of s2 object = "<<s2.show();
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s2 = ++s1;
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cout<<"\ns1 = "<<s1.show();
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cout<<"\nValue of s2 after prefix operation = "<<s2.show();
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s2 = s1++;
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cout<<"\ns1 = "<<s1.show();
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cout<<"\nValue of s2 after prefix operation = "<<s2.show();
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return 0;
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}

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