Add 3 numbers.

//Program to add 3 numbers.
#include<iostream.h>
#include<conio.h>
void main()
{
    clrscr();
    int a,b,c;
    cout<<"Enter first number: ";
    cin>>a;
    cout<<"Enter second number: ";
    cin>>b;
    cout<<"Enter third number: ";
    cin>>c;
    a=a+b+c;
    cout<<"The sum of the numbers is: "<<a;
    getch();
}