Sum of Array In C Language

SUM OF ARRAY IN C LANGUAGE:-

#include<stdio.h>
int sum(int a[],int s);
int main()
{
int add;
int s=10;
int arr[s]={1,1,1,1,1,1,1,1,1,1};
int ary[s]={1,1,1,1,1,1,1,1,1,1};
add=sum(arr,s)+sum(ary,s);
printf("Sum of these array=%d",add);
return 0;
}
int sum(int a[],int s)
{
int sum,i;
sum=0;
for(i=0;i<s;i++)
{
sum=sum+a[i];
}

}

OUTPUT:-

Sum of these array=20