C++ programme to illustrate a calculator. Perform calculations on two operands using a class calculator. Calculator should add, subtract, multiply and divide operands

#include<iostream.h>

#include<conio.h>

#include<process.h>

class calculator

{

               float result;

               int o1,o2;

               public:

               void enter();

               void showresult();

               void add();

               void sub();

               void mul();

               void div();

               void clear();

};

void calculator::enter()

{

               cout<<"Enter a operant:";

               cin>>o1;

               cout<<"Enter the other operant:";

               cin>>o2;

}

void calculator::showresult()

{

               cout<<"The result of the operation is:"<<result<<endl;

}

void calculator::add()

{

               result=o2+o1;

}

void calculator::sub()

{

               result=o1-o1;

}

void calculator::mul()

{

               result=o1*o2;

}

void calculator::div()

{

               result=o1/o2;

}

void calculator::clear()

{

               result=0;

}

int main()

{

               char ch='y';

               calculator c1;

               while(ch=='y')

               {

                              c1.enter();

                              cout<<"Which operation do you want to perform:";

                              cin>>ch;

                              switch(ch)

                              {

                                             case '+':c1.add();

                                                            break;

                                             case '-':c1.sub();

                                                            break;

                                             case '*':c1.mul();

                                                            break;

                                             case '/':c1.div();

                                                            break;

                                             default :cout<<"Wrong choice:";

                                                            exit(0);

                              }

                              c1.showresult();

                              c1.clear();

                              cout<<"Do you want to continue:";

                              cin>>ch;

               }

               return 0;

}

OUTPUT:

 Enter a operand:4

Enter the other operand:8

Which operation do you want to perform:*

The result of the operation is:32

Do you want to continue:y

Enter an operand:4

Enter the other operand:8

Which operation do you want to perform:+                                       

The result of the operation is:12                                              

Do you want to continue:n