1-N recursive

#include <stdio.h>
int summ(int n);
int main ()
{
    int i,n,c,b;
    printf("N = ");
    scanf("%d",&n);
    c=summ(n);
    printf("Sum = %d ",c);
}
int summ(int n)
{
    if(n==1)
       return 1;
   else
       return n+summ(n-1);

}