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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <ctype.h>
  5.  
  6. int main() {
  7.     int n, i;
  8.     int a = 0;
  9.     char s[100];
  10.  
  11.     if (fgets(s, 100, stdin) == NULL) {
  12.         return 0;
  13.     }
  14.  
  15.     n = strlen(s);
  16.  
  17.     // 如果最後一個字元是換行，就去掉它
  18.     if (n > 0 && s[n - 1] == '\n') {
  19.         s[n - 1] = '\0';
  20.         n--;
  21.     }
  22.  
  23.     // 如果輸入太短
  24.     if (n < 8) {
  25.         printf("Too short.");
  26.         return 0;
  27.     }
  28.  
  29.     // 檢查是否有大寫字母
  30.     for (i = 0; i < n; i++) {
  31.         if (isupper((unsigned char)s[i])) {
  32.             a++;
  33.             break;
  34.         }
  35.     }
  36.  
  37.     // 檢查是否有小寫字母
  38.     for (i = 0; i < n; i++) {
  39.         if (islower((unsigned char)s[i])) {
  40.             a++;
  41.             break;
  42.         }
  43.     }
  44.  
  45.     // 檢查是否有數字
  46.     for (i = 0; i < n; i++) {
  47.         if (isdigit((unsigned char)s[i])) {
  48.             a++;
  49.             break;
  50.         }
  51.     }
  52.  
  53.     // 檢查是否有特殊符號
  54.     for (i = 0; i < n; i++) {
  55.         if (!isalnum((unsigned char)s[i])) {
  56.             a++;
  57.             break;
  58.         }
  59.     }
  60.  
  61.     if (a == 1) {
  62.         printf("Low.");
  63.     } else if (a == 2) {
  64.         printf("Medium.");
  65.     } else if (a >= 3 && a <= 4) {
  66.         printf("Strong.");
  67.     }
  68.  
  69.     return 0;
  70. }
  71.  
Success #stdin #stdout 0s 5320KB
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stdin
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abc123
stdout
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Too short.
https://ideone.com/WgLI3j
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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