What is the usage of PathFileExists
PathFileExists用法:1、需要包含头文件“#include
”；2、调用“PathFileExistsA”或“PathFileExistsW”函数，传入要检查的文件或目录的路径作为参数；3、根据返回值判断文件或目录是否存在。
PathFileExists函数是一个Windows API函数，用于检查指定路径下是否存在指定文件或目录。
函数原型如下：
BOOL PathFileExistsA( LPCSTR pszPath ); BOOL PathFileExistsW( LPCWSTR pszPath );
参数说明：
pszPath：要检查的文件或目录的路径，可以是相对路径或绝对路径。对于Unicode版本，参数类型为LPCWSTR；对于ANSI版本，参数类型为LPCSTR。
返回值：
如果文件或目录存在，则返回TRUE。
如果文件或目录不存在，则返回FALSE。
使用方法：
首先，需要包含头文件#include
调用PathFileExistsA或PathFileExistsW函数，传入要检查的文件或目录的路径作为参数。
根据返回值判断文件或目录是否存在。
示例代码：
#include <shlwapi.h>
#include <stdio.h>
int main() {
LPCWSTR path = L"C:\\Windows\\System32\\notepad.exe";
BOOL exists = PathFileExistsW(path);
if (exists) {
wprintf(L"文件存在\n");
} else {
wprintf(L"文件不存在\n");
}
return 0;
}上述代码中，首先定义了一个路径C:\Windows\System32\notepad.exe，然后调用PathFileExistsW函数检查该路径下的文件是否存在，根据返回值输出相应的结果。
PathFileExists函数的使用场景：
检查文件是否存在：可以通过PathFileExists函数检查指定路径下的文件是否存在，从而避免出现文件不存在的错误。
检查目录是否存在：可以通过PathFileExists函数检查指定路径下的目录是否存在，从而避免出现目录不存在的错误。
总结：
PathFileExists函数是一个用于检查指定路径下文件或目录是否存在的函数，可以帮助我们在编程中避免出现文件或目录不存在的错误，提高程序的健壮性。
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