80rnBz - Online C Compiler & Debugging Tool

#include <stdio.h>

int acc(int x) {
    static int sum = 0;
    static int count = 0;

    if (x >= 0) {
        sum += x;
        count++;
        return sum;
    }
    else if (x == -1) {
        return sum;
    }
    else if (x == -2) {
        return count;
    }
    else {  // x <= -3
        return -1;
    }
}

int main(void) {
    printf("%d\n", acc(3));
    printf("%d\n", acc(4));
    printf("%d\n", acc(-3));
    printf("%d\n", acc(-2));
    printf("%d\n", acc(-1));
    printf("%d\n", acc(5));
    return 0;
}