// An example of a C program with a recursive function

#include <stdio.h>

int sum_to(int n);

int main(void) {
    int max = 10;
    int result = sum_to(max);
    printf("Sum 1.. ");
    printf("%d", max);
    printf(" = ");
    printf("%d", result);
    putchar('\n');
    return 0;
}

int sum_to(int n) {
    int result;
sum_to_if_0:
    if (n != 0) goto sum_to_else;
        return 0;
sum_to_else:
       result = sum_to(n-1); 
       return n + result;   
}