c++ - 通过 stat() 函数传递字符串

Question

我有以下代码:

#include <stdio.h>       // For printf()
#include <sys/stat.h>   // For struct stat and stat()

struct stat stResult;

if(stat("Filename.txt", &stResult) == 0)
{
      // We have File Attributes
      // stResult.st_size is the size in bytes (I believe)
      // It also contains some other information you can lookup if you feel like it
printf("Filesize: %i", stResult.st_size);
}
else
{
      // We couldn't open the file
printf("Couldn't get file attributes...");
}

现在。如何通过 stat() 传递我自己的字符串？像这样

string myStr = "MyFile.txt";
stat(myStr, &stResult)

Answer 1

如果你在谈论 C++ std::string，你可能想使用

string myStr = "MyFile.txt";
stat(myStr.c_str(), &stResult)

所以使用字符串对象的 c_str() 成员函数来获得 C 字符串表示。