How to implement C++ programming to find and traverse files using findfirst and findnext

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Catalogue

First, take a look at a file structure:

Use _ findfirst and _ findnext to find files

Both of these functions are in io.h.

First, take a look at a file structure: struct _ finddata_t {unsigned attrib; time_t time_create; time_t time_access; time_t time_write; _ fsize_t size; char name;}

Time_t is actually long.

And _ fsize_t, which is unsigned long.

Now let's explain the data members of the structure.

Attrib, which is the attribute of the file you are looking for:

_ A_ARCH (archived), _ A_HIDDEN (hidden), _ A_NORMAL (normal),

_ A_RDONLY (read-only), _ A_SUBDIR (folder), _ A_SYSTEM (system).

Time_create, time_access, and time_write are the time the file was created, the last time the file was accessed, and the last time the file was modified.

Size: file siz

Name: file name.

Use _ findfirst and _ findnext to find files

1. _ findfirst function: long _ findfirst (const char *, struct _ finddata_t *)

The first parameter is the file name, and you can use "*. *" to find all files, or "* .cpp" to find .cpp files. The second parameter is the _ finddata_t structure pointer. If the search is successful, the file handle is returned; if it fails,-1 is returned.

2. _ findnext function: int _ findnext (long, struct _ finddata_t *)

The first parameter is the file handle, and the second parameter is also the _ finddata_t structure pointer. If the lookup is successful, it returns 0, and if it fails, it returns-1.

3. _ findclose () function: int _ findclose (long)

There is only one parameter, the file handle. If the shutdown successfully returns 0, the failure returns-1.

# include # include # include using namespace std;bool transfer (string fileName, int exeNum); void dfsFolder (string folderPath, ofstream & fout); int main () {_ finddata_t file; int k; long HANDLE; k = HANDLE = _ findfirst ("*. *", & file); while (k! =-1) {cout