test if file exist c++ code example
Example 1: c++ check if file exits
#include <fstream>
#include<iostream>
using namespace std;
int main() {
/* try to open file to read */
ifstream ifile;
ifile.open("b.txt");
if(ifile) {
cout<<"file exists";
} else {
cout<<"file doesn't exist";
}
}
Example 2: check file exist cpp
Method exists_test0 (ifstream): **0.485s**
Method exists_test1 (FILE fopen): **0.302s**
Method exists_test2 (posix access()): **0.202s**
Method exists_test3 (posix stat()): **0.134s**