c++ - 输入奇数时打印空字符

Question

我已经研究这个 c 程序一段时间了，但我似乎无法弄清楚我遗漏了什么。

在我的代码的最底部，我有一个用“-”替换所有其他单词的函数。我的问题是，当我输入一个奇数编号的单词时，例如“Cat”、“dog”、“hamburger”，它会在我认为是空字符的位置放置一个“-”，尽管我无法做到揭穿它。

感谢您的帮助!

    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>

    void replace(char w[]);

    int main( )
    {
        char w[100], x[100], y[100];
        int z = 0;

    printf("Player 1, please enter the secret word: ");
    fgets(x,100,stdin); 

//    system("clear");  

    while( strcmp(x,y) != 0 )
    {
        strcpy(w,x);
     //   printf("\nLength of String : %d", strlen(w)-1);
        replace(w);
        printf("Player 2, the word is %s\n",w);
        printf("Player 2, please guess the word: ");
        fgets(y,100,stdin);
        z++;
        if( strcmp(x,y) != 0 )
        {
            printf("Wrong. Try again.\n");
        }
        else
        {
            //system("clear");
            printf("Correct!\n");
            printf("It took you %d attempt(s).\n",z);
            switch (z)
            {
                case 1 :
                case 2 :     
                     printf("A. Awesome work!");
                     {break;}

                case 3 :
                case 4 :
                     printf("B. Best, that was!");
                     {break;}

                case 5 :
                case 6 :
                     printf("C. Concentrate next time!");
                     {break;}

                case 7 :
                     printf("D. Don't quit your day job.");
                     {break;}

                default :
                     printf("F. Failure.");
                     {break;}
            }
        }
    }
        getch();
}

void replace(char w[])
{
    int a;

    a = 0;
    while (w[a] != '\0')
    {
        if (a % 2 != 0)
        {
            w[a] = '-';
            a++;
        }
        if (w[a] != '\0')
        {
            a++;
        }
        else
        {
            break;
        }
    }
}

Answer 1

来自fgets manual ;

fgets() reads in at most one less than size characters from stream and stores them into the buffer pointed to by s. Reading stops after an EOF or a newline. If a newline is read, it is stored into the buffer. A terminating null byte (\0) is stored after the last character in the buffer.

输入的换行符就是您要替换的内容。