Question

C++怎样判断某一文件是否存在

C++怎样判断某一文件是否存在

Answer 1

#include <iostream>
#include <fstream>
using namespace std;
#define FILENAME "XXXX.XXX"
int main()
{
fstream _file;
_file.open(FILENAME,ios::in);
if(!_file)
{
cout<<FILENAME<<"not exist!";
}
else
{
cout<<FILENAME<<"already exist!";
}
return 0;
}