# include<stdio.h>
void main ( )
{
int a, b , c , sum;
int add (int, int, int);
printf("Enter three numbers ");
scanf("%d%d%d",&a,&b,&c);
sum = add ( a , b , c);
printf("Sum = %d",sum);
}
add (int x, int y, int z)
{
int s ;
s = x + y + z;
return ( s) ;
}