Calculate an addition and print out the result

/* Calculate an addition and print out the result  0301 */

#include<stdio.h>
int integer_add( int x, int y )
{
    int result;
    result = x + y;
    return result;
}

void main()
{
    int sum;
    sum = integer_add(5,6);
    printf("The addition of 5 and 6 is %d.\n",sum);
}