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需要了解 _findfirst 和 _findnext 如何与模式输入一起工作。

我曾经遵循代码来分析它们的功能，但结果让我感到困惑。

    intptr_t handle;
    struct _finddata_t fblock;
    int count = 1;
    char pattern[] = "*";
    printf("Pattern is %s",pattern);
    if((handle = _findfirst(pattern,&fblock))>0){
        printf("\nfound : %d :: ",count++);
        printf("%s",fblock.name);
        while(_findnext(handle,&fblock) == 0){
            printf("\nfound : %d :: ",count++);
            printf("%s",fblock.name);
        }
    }
    printf("\ncompleted");
    //getch();

结果：我的文件夹中有四个文件。

1.ReadMe.txt
2.ReadMe1.txt
3.ReadMe1.txt_bck
4.ReadMe1.txtbck

现在，

Enter pattern :*.tx
Pattern is *.tx
completed

好的。没有带有 ext tx 的文件

Enter pattern :*.txt_
Pattern is *.txt_
completed

好的。也没有带有 ext txt_ 的文件

Enter pattern :*.txt
Pattern is *.txt
found : 1 :: ReadMe.txt
found : 2 :: ReadMe1.txt
found : 3 :: ReadMe1.txtbck
found : 4 :: ReadMe1.txt_bck
completed

？？？我只要求 ext txt。为什么会显示 txt_bck？

Enter pattern :*.txt*
Pattern is *.txt*
found : 1 :: ReadMe.txt
found : 2 :: ReadMe1.txt
found : 3 :: ReadMe1.txtbck
found : 4 :: ReadMe1.txt_bck
completed

现在这个和上一个有什么区别？

Enter pattern :ReadMe?.txt
Pattern is ReadMe?.txt
found : 1 :: ReadMe.txt
found : 2 :: ReadMe1.txt
completed

预期的 ”？” 通配符将只匹配一个字符，但它也匹配 0。

Enter pattern :ReadMe*.txt
Pattern is ReadMe*.txt
found : 1 :: ReadMe.txt
found : 2 :: ReadMe1.txt
found : 3 :: ReadMe1.txtbck
found : 4 :: ReadMe1.txt_bck
completed

_

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