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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4. #include <string.h>
  5. #include <ctype.h>
  6. #include <stdbool.h>
  7.  
  8. void generateAnswer(int answer[]) {
  9.     bool used[10] = {false};
  10.     int count = 0;
  11.     while (count < 4) {
  12.         int digit = rand() % 10;
  13.         if (!used[digit]) {
  14.             used[digit] = true;
  15.             answer[count++] = digit;
  16.         }
  17.     }
  18. }
  19.  
  20. bool isValidInput(char input[]) {
  21.     if (strlen(input) != 4) return false;
  22.  
  23.     bool used[10] = {false};
  24.     for (int i = 0; i < 4; i++) {
  25.         if (!isdigit(input[i])) return false;
  26.         int digit = input[i] - '0';
  27.         if (used[digit]) return false;
  28.         used[digit] = true;
  29.     }
  30.     return true;
  31. }
  32.  
  33. bool getGuess(int guess[]) {
  34.     char input[100];
  35.  
  36.     if (scanf("%s", input) == EOF) {
  37.         return false; // 輸入結束
  38.     }
  39.  
  40.     if (!isValidInput(input)) {
  41.         return false; // 非法輸入
  42.     }
  43.  
  44.     for (int i = 0; i < 4; i++) {
  45.         guess[i] = input[i] - '0';
  46.     }
  47.  
  48.     return true;
  49. }
  50.  
  51. void checkAB(int answer[], int guess[], int* A, int* B) {
  52.     *A = 0;
  53.     *B = 0;
  54.  
  55.     for (int i = 0; i < 4; i++) {
  56.         if (guess[i] == answer[i]) {
  57.             (*A)++;
  58.         } else {
  59.             for (int j = 0; j < 4; j++) {
  60.                 if (guess[i] == answer[j] && i != j) {
  61.                     (*B)++;
  62.                     break;
  63.                 }
  64.             }
  65.         }
  66.     }
  67. }
  68.  
  69. int main() {
  70.     int answer[4], guess[4];
  71.     int A = 0, B = 0;
  72.     int attempts = 0;
  73.  
  74.     srand(20240408); // 固定 seed，讓評測系統有一致答案
  75.  
  76.     generateAnswer(answer);
  77.  
  78.     while (A != 4) {
  79.         if (!getGuess(guess)) {
  80.             printf("輸入錯誤或輸入結束。\n");
  81.             break;
  82.         }
  83.         checkAB(answer, guess, &A, &B);
  84.         printf("%dA%dB\n", A, B);
  85.         attempts++;
  86.     }
  87.  
  88.     if (A == 4) {
  89.         printf("恭喜你猜對了！總共猜了 %d 次！\n", attempts);
  90.     }
  91.  
  92.     return 0;
  93. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
1234
5678
9012
1230
4567
8456
stdout
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0A1B
0A3B
0A0B
0A0B
0A3B
4A0B
恭喜你猜對了！總共猜了 6 次！
https://ideone.com/apLNoM
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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