Submission #1987050

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Source Code Expand

#include <stdio.h>
#include <stdlib.h>
#define ms_valtype int

//比較関数
int compare_ms(ms_valtype a, ms_valtype b){
	return a - b;
}

//昇順
void sort_sub(ms_valtype *origin, int left, int right, ms_valtype *tmp){
	if(right - left > 1){
		int i, j, k, half = (left + right) / 2;
		sort_sub(origin, left, half, tmp);
		sort_sub(origin, half, right, tmp);
		for(i = left; i < right; i++){
			tmp[i] = origin[i];
		}
		for(i = left, j = left, k = half; i < right; i++){
			if(k == right){
				origin[i] = tmp[j];
				j++;
			}
			else if(compare_ms(tmp[j], tmp[k]) <= 0 && j < half){
				origin[i] = tmp[j];
				j++;
			}
			else{
				origin[i] = tmp[k];
				k++;
			}
		}
	}
}

void sort(ms_valtype *origin, int N){
	ms_valtype *tmp = (ms_valtype *)malloc(sizeof(ms_valtype) * N);
	sort_sub(origin, 0, N, tmp);
	free(tmp);
}

int main(){
	int N, i, j;
	double ans;
	scanf("%d", &N);
	int *C = (int *)malloc(sizeof(int) * N);
	int *D = (int *)malloc(sizeof(int) * N);
	for(i = 0; i < N; i++){
		scanf("%d", &C[i]);
		D[i] = 0;
	}
	sort(C, N);
	for(i = 0; i < N; i++){
		for(j = 0; j < N; j++){
			if(C[j] % C[i] == 0){
				D[j]++;
			}
		}
	}
	for(i = 0, ans = 0; i < N; i++){
		ans += (double)((D[i] + 1) / 2) / D[i];
	}
	printf("%.12lf\n", ans);
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:45:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ^
./Main.c:49:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &C[i]);
   ^

Judge Result