我的 MSYS2 编译器有点心脏问题

Question

我又在做作业了，我的作业是与土耳其城市的刽子手游戏。 代码还没有完成，因为有一个有趣的问题。 当我用 MSYS2 编译器运行代码时，我的输出应该是这样的：

_______ //the random cities letter numbers determines how many "_" in here
Sehri tahmin et! // "Guess the city!"
Bir harf soyle //pls tell me a letter
b //user input 
Tahmin ettigin harf: b // the letter u guessed
_ _ _ _ _ //?
Bir harf soyle //pls tell me a letter
u //user input
Tahmin ettigin harf: u // the letter u guessed
_ _ _ _ _ //?
Bir harf soyle //pls tell me a letter
a //user input
Tahmin ettigin harf: a // the letter u guessed
a _ _ _ _ //user input
Bir harf soyle //pls tell me a letter

但它看起来像这样：

_ _ _ _ _ 
Sehri tahmin et!// "Guess the city!"
Bir harf soyle //pls tell me a letter
b //user input 
Tahmin ettigin harf: b // the letter u guessed
♥ _ _ _ _ //?
Bir harf soyle //pls tell me a letter
u //user input
Tahmin ettigin harf: u // the letter u guessed
♥ _ _ _ _ //?
Bir harf soyle //pls tell me a letter
a //user input
Tahmin ettigin harf: a // the letter u guessed
a _ _ _ _ //user input
Bir harf soyle //pls tell me a letter

有一颗心出现，直到我猜对了第一个字母

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

struct correctGuess{
    int letterNumber;
    char letter;
};

int main() {
    srand(time(NULL));
    char cities[][10] = { "antalya","ankara","istanbul","izmir","kutahya","bursa","konya","afyon","balikesir","mugla" };
    

    char guessedLetter[30];
    struct correctGuess correctGuess[10];
    
    

    char indexLetter;


    int i = 0, guessCounter = 0;
    int letter = 0;
    int random = (int)(rand() % 10);

    while (cities[random][i] != '\0') {
        letter++;
        i++;
        correctGuess[i].letterNumber = i;
        correctGuess[i].letter = '\0';
    }
    
    
   

    for (int i = 0; i < letter; i++) {
        printf("_ ");
        if (i == (letter - 1)) {
            printf("\n");
        }
    }

    printf("Sehri tahmin et!\n"); //en: "Guess the city!"
    
    for (;;) {
        printf("Bir harf soyle\n"); //en: "pls tell me a letter"
        scanf(" %c", &indexLetter);
        while (getchar() != '\n'); 
        printf("Tahmin ettigin harf: %c\n", indexLetter); //en: "The letter u guessed
        guessCounter++;
        guessedLetter[guessCounter] = indexLetter;
        int correctGuessIndex = 0;
        for (int i = 0; i < letter; i++)
        {
            if(cities[random][i] == indexLetter){
                
                correctGuess[correctGuessIndex].letter = indexLetter;
                correctGuess[correctGuessIndex].letterNumber = i;
                
            }
            correctGuessIndex++;
        }
        
        for(int i = 0; i < letter; i++){
            if(correctGuess[i].letter == '\0'){
                printf("_ "); //the problem probably here!!
            }else{
                printf("%c ",correctGuess[i].letter);
            }

            if(i == (letter - 1)){
                printf("\n");
            }
        }
       
    }

 
    return 0;
}

所以我的问题只在我使用 msys2 编译器时出现，但是当我使用像 this 这样的在线编译器时它工作正常。我该如何解决？为什么会这样？

Answer 1

这个“心”字大概是个控制字。 ASCII控制字符做一些控制，但也可以按字面意思显示； ♥ 是其中之一，代码为 3.

注意显示的不是下划线

_

。代码打印

correctGuess[i].letter

。所以你可以合理地确定在代码的那个地方，它有这个奇怪的值 3.

为什么它在那里有那个价值？它未初始化；它可以有任何价值。未初始化的变量通常值为 0；这看起来好像您的代码正常工作。