How to make calculator in c++

#include<conio.h>
#include<iostream.h>
void main()
{
 clrscr();
 int a,b;
 char c;
 cout<<"Enter the vslue for a and b\n";
 cin>>a>>b;
 cout<<"Enter the operators(+,-,* and /)\n";
          cin>>c;

 switch(c)
{
 case '+': cout<<a+b;break;
 case '-': cout<<a-b;break;
 case '*': cout<<a*b;break;
 case '/': cout<<a/b;break;
  default: cout<<"Wrong Input";break;

}

  getch();

}



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