c - C 中的字母猜谜游戏

Question

我得到的错误是游戏数量没有正确显示。 例如，我选择玩2场比赛。然后，我试图正确猜出第一个数字。显示了解决方案，然后跳转到下一个游戏。但是，第二场比赛显示为第三场比赛而不是第二场比赛。 我又试了一次。这次，我猜错了 1 次，猜对了 1 次。第二次猜测后，游戏显示了解决方案，然后尽管我选择玩 2 场比赛并且只进行了 1 场比赛，但比赛停止了。 LetterList 文件中字母的顺序是 d 乙 G w 问 吨 r 是 你 X 所以第一场比赛以“d”开始，然后是“B”，然后等等...... 该错误显示为好像程序本身摆脱了偶数。 我不知道它出了什么问题。

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <ctype.h>
#define MAXGUESSES 5


void LetterGuessRules();
void GuessTheLetter(char);
char GetTheGuess();
int CompareLetters(char, char);

int main()
{
    FILE *inPtr;
    int numGames, i = 0;
    char letter;

    //display the game rule
    LetterGuessRules();

    printf("\nHow many games do you want to play? (Max 10) >> ");
    scanf("%d", &numGames);
    printf("\n\n************************************************\n");
    inPtr = fopen("letterList.txt", "r");

    for (i = 0; i < numGames; i++)
    {
        //get a solution letter from file - use fscanf
        fscanf(inPtr," %c", &letter);
        //change the solution to lowercase
        letter = tolower(letter);
        //print the solution back onto the screen to test

        //Close this when play the game to hide the foreseen solution
        printf("\nThe letter is %c\n", letter);   

        //Number of match
        printf("\t\tGame %d\n", i += 1);

        //call the GuessTheLetter function and pass it the solution
        GuessTheLetter(letter);
    }
    fclose(inPtr);
    return 0;
}

void GuessTheLetter(char letter)
{
    int win = 0;
    int numGuesses = 0;
    char myGuess;

    while (numGuesses < MAXGUESSES && win == 0)
    {
        //get a guess from the user  by calling the GetTheGuess function
        myGuess = GetTheGuess();

        //change the guess to lowercase
        myGuess = tolower(myGuess);

        //win = call the function to compare the guess with the solution
        win = CompareLetters(letter, myGuess);

        numGuesses++;//count the number of guesses so far

        //use conditions to let the user know if they won or lost the round of the game
        if (win == 0)
        {
            printf("\nOops its wrong.\n");
            if (myGuess < letter)
            {
                printf("Your guessed letter -%c- comes before the solution\n", myGuess);
                printf("Please guess again :)\n");
            }
            else if (myGuess > letter)
            {
                printf("Your guessed letter -%c- comes after the solution\n", myGuess);
                printf("Please guess again :)\n");
            }
            if (numGuesses == MAXGUESSES && win == 0)
                printf("Aw you have lost this game!");
                printf("\n");
        }
        else if (win == 1)
        {
            printf("\nYou have guessed it right!\n");
            printf("Wonderful! You ACE'd this match!\n");
            printf("\n");
            printf("**** If you play more than 1 game, new match will automatically start ****\n");
            printf("\tYou only need to keep guessing for the next letter\n");
            printf("------------------------------------------------------------------------------");
            printf("\n");
        }
    }
}

char GetTheGuess()
{
    char myGuess;
    printf("\t_______________________");
    printf("\n\t|What's your guess? >> "); 
    scanf(" %c", &myGuess);

    return myGuess;
}

void LetterGuessRules()
{
    printf("\n*** Instruction: ");
    printf("\nYou will have 5 attempts to guess the right answer");
    printf("\nIf you guess it right, the game will end with your victory.");
    printf("\nOtherwise, you will have to guess again.");
    printf("\nPlease have fun!");
}

int CompareLetters(char letter, char myGuess)
{
    if (letter == myGuess)
    {   
        return 1;
    }
    else
    {
        return 0;
    }
}

Answer 1

问题是你增加了i两次。首先在for循环，并再次在这里:

    //Number of match
    printf("\t\tGame %d\n", i += 1);

这可能是因为你得到了 Game 0没有它。简单的解决方法是从 1 而不是 0 开始循环。

自 i意味着比“循环迭代器”更多的东西我称之为更具描述性的东西 gameNum .

/* from 1 to numGames */
int gameNum;
for( gameNum = 1; gameNum <= numGames; gameNum++ ) {
    ...
}

请注意，我检查了 gameNum <= numGames而不是 gameNum < numGames因为我们现在从 1 开始。

另外你需要检查文件是否打开，否则如果 letterList.txt 不存在它会崩溃。

#include <errno.h>   /* for errno */
#include <string.h>  /* for strerror() */
#include <stdlib.h>  /* for exit() */

inPtr = fopen("letterList.txt", "r");
if( inPtr == NULL ) {
    fprintf(stderr, "Could not open letterList.txt: %s\n", strerror(errno));
    exit(1);
}

最后，我建议不要使用 #define _CRT_SECURE_NO_WARNINGS在学习 C 的同时。那些安全警告很重要。