#include <stdio.h>
 
void sum(int kosuu, int data[], int *sum) {
    int s = 0;
    for (int i = 0; i <= kosuu; i++) {
        s += data[i];
    }
    *sum = s;
}
 
int main(void) {
    int data1[5] = {10, 15, 8, 30, 7};
    int data2[6] = {10, 20, 30, 40, 50, 60};
    int sum1, sum2;
 
    sum(4, data1, &sum1); 
    sum(5, data2, &sum2); 
 
    printf("sum1 = %d\n", sum1);
    printf("sum2 = %d\n", sum2);
 
    return 0;  // main の戻り値を明示するとさらに良い
}
 

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