Back To C++ Menu Driven Functions

//program to make a simple calculator using functions and switch statement (example of menu driven program)
#include<iostream.h>
#include<conio.h>
void add(int a,int b)
{
	int sum;
	sum=a+b;
	cout<<"\nsum of a and b is "<<sum;
}
void subtract(int a,int b)
{
	int difference;
	difference=a-b;
	cout<<"\ndifference between a and b is "<<difference;
}
void multiply(int a,int b)
{
	int product;
	product=a*b;
	cout<<"\nproduct of a and b is "<<product;
}
void divide(int a,int b)
{
	int quotient;
	quotient=a/b;
	cout<<"\nquotient of a divided by b is "<<quotient;
}
void main()
{
	int a,b;
	int choice;
        clrscr();
	cout<<"\nenter a value for a ";
	cin>>a;
	cout<<"\nenter a value for b ";
	cin>>b;
	cout<<"\n 1. Add a and b ";
	cout<<"\n 2. Subtract a and b ";
	cout<<"\n 3. Multiply a and b ";
	cout<<"\n 4. Divide a by b ";
	cout<<"\nenter your choice (1,2,3,4)";
	cin>>choice;
	switch(choice)
	{
	case 1: add(a,b);
			break;
	case 2: subtract(a,b);
			break;
	case 3: multiply(a,b);
			break;
	case 4: divide(a,b);
			break;
	default: cout<<"\nenter a valid choice (1,2,3,4)";
	}
	getch();
}