C++ check if file exits

Check file exist cpp

#include <sys/stat.h>
#include <unistd.h>
#include <string>
#include <fstream>

inline bool exists_test0 (const std::string& name) {
    ifstream f(name.c_str());
    return f.good();
}

inline bool exists_test1 (const std::string& name) {
    if (FILE *file = fopen(name.c_str(), "r")) {
        fclose(file);
        return true;
    } else {
        return false;
    }   
}

inline bool exists_test2 (const std::string& name) {
    return ( access( name.c_str(), F_OK ) != -1 );
}

inline bool exists_test3 (const std::string& name) {
  struct stat buffer;   
  return (stat (name.c_str(), &buffer) == 0); 
}

Source: stackoverflow.com

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";
   }
}

Source: tutorialspoint.com

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**

Source: stackoverflow.com

Similar codes

6 votes162 views3 answers
Sstream c++
C++
1 vote128 views1 answer
Add element to start of vector c++
C++
1 vote213 views1 answer
C++ multithreading
C++
0 vote176 views1 answer
Deifine an object in C++
C++
2 votes166 views1 answer
Clear buffer memory in c / c++
C++
0 vote160 views1 answer
Min element in stl c++
C++
0 vote185 views1 answer
Cocos2d c++ linux
C++
1 vote169 views1 answer
How to iterate throguh a string in c++
C++
0 vote169 views1 answer
What does catch(...) mean in c++
C++
1 vote121 views1 answer
Qt can't use ^ operator on qchar
C++