Fastest way to check if a file exist using standard C++/C++11/C?

Question

Fastest way to check if a file exist using standard C++/C++11/C?

I would want to discover the quickest method to verify if a file exists in standard C++11, C++, or C. I have thousands of files and before preparing something on them I need to examine if all of them exist. What can I write rather than / SOMETHING */ in the subsequent function?

inline bool exist(const std::string& name)

{

    /* SOMETHING /

}

file cpp

4 years ago by Bharatgxwzm

2 Answers

Login / Signup to Answer the Question.

Login Signup

**rahul07** · Answer 1 · 2021-05-15T13:50:24

Remark : in C++14 and as soon as the filesystem TS will be finished and adopted, the solution will be to use:



std::experimental::filesystem::exists("helloworld.txt");

and since C++17, only:



std::filesystem::exists("helloworld.txt");

**RoliMishra** · Answer 2 · 2021-05-17T14:55:17

I use this piece of code, it works OK with me so far.

bool is_file_exist(const char *fileName)

{

    std::ifstream infile(fileName);

    return infile.good();

}

C TUTORIAL

C PROGRAMS

INTERVIEW TESTS

EXECUTE CODE

C++ TUTORIAL

C++ PROGRAMS

INTERVIEW TESTS

EXECUTE CODE

PYTHON TUTORIAL

PYTHON HOW TOS

INTERVIEW TESTS

EXECUTE CODE

JAVA TUTORIAL

JAVA CODE EXAMPLES

SPRING TUTORIAL

MORE IN JAVA

COMPUTER ARCHITECTURE

COMPUTER NETWORK

OPERATING SYSTEM

DBMS & SQL

PL/SQL

MongoDB

EXECUTE SQL

ANDROID DEVELOPMENT

GO LANGUAGE

LINUX

DOCKER

HTML TAGS (A to Z)

CSS REFERENCES

SASS/SCSS

KOTLIN

GAME DEVELOPMENT

PHP

GIT GUIDE

JAVASCRIPT

ADVANCED DSA

Fastest way to check if a file exist using standard C++/C++11/C?

2 Answers

Login / Signup to Answer the Question.