01: #include <stdio.h>
02:
03: int main(void)
04: {
05: int n;
06: int i;
07:
08: printf("n=");
09: scanf("%d", &n);
10: for(i = n - 1;n % i != 0;i--)
11: {
12: }
13: if(i == 1)
14: {
15: printf("%dは素数です", n);
16: }
17: else
18: {
19: printf("%dは素数ではありません", n);
20: }
21:
22: return 0;
23: }