01: #include <stdio.h>
02:
03: int main(void)
04: {
05: int n;
06: int i;
07: int count = 0;
08:
09: printf("n=");
10: scanf("%d", &n);
11: for(i = 1;i <= n;i++)
12: {
13: if(n % i == 0)
14: {
15: count++;
16: }
17: }
18: if(count == 2)
19: {
20: printf("%dは素数です", n);
21: }
22: else
23: {
24: printf("%dは素数ではありません", n);
25: }
26:
27: return 0;
28: }