尝试一下:):

Try it :) :

#define MAX_PATH 256
#define ROOT_DIR "C:\\ABC\\"

// 1)
{
  char szPathedFileName[MAX_PATH] = {0};
  sprintf(szPathedFileName, "%s%s", ROOT_DIR, "test.txt");
  // use the buffer now
...
}

// 2)
{
  char szPathedFileName[MAX_PATH] = {0};
  strcat(szPathedFileName, ROOT_DIR);
  strcat(szPathedFileName, "test.txt");
  // use the buffer now
...
}

当您在这里遇到任何编译器错误时-
请参阅以下内容的安全说明:strcpy_s和sprintf_s:)

When you will get any compiler errors here -
please see the secure replcement with: strcpy_s and sprintf_s :)

FILE * file = fopen("PATH + Poo.txt"，"w +");

FILE *file = fopen(" PATH+Poo.txt","w+");

更改为

Change to

FILE *file = fopen(PATH "Poo.txt", "w+"); 

:)

不错.
这是简单可行的解决方案.

但是，如果我的文件名存储在一个变量中，那么我将如何使用fopen.
仅使用Sprintf/strcat吗?

非常感谢.

Nice One.
This is simple and workable solution.

But if my filename is stored in one variable then how I''ll use fopen.
Using Sprintf/strcat only?

Thanks a lot.