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  1. #include <stdio.h>
  2.  
  3. int main(void)
  4. {
  5.     int n, count = 0;
  6.  
  7.     if (scanf("%d", &n) != 1 || n < 1) {
  8.         printf("Input error");
  9.         return 0;
  10.     } 
  11.  
  12.     for(int i = 1; i <= n; i++) {
  13.         if (n % i == 0) {
  14.             count++;
  15.         }
  16.     }
  17.  
  18.     if (count == 2) {
  19.         printf("yes");
  20.     } else {
  21.         printf("no");
  22.     }
  23.  
  24.     return 0;
  25. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin 
7
stdout 
yes
https://ideone.com/GIQQaY
Проверяем является ли число простым
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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