如何修复 clang：错误：linker 命令失败，退出代码为 1（使用 -v 查看调用）

Question

I am trying to learn c++ but I cannot run a basic HelloWorld program.

Im am receiving an error saying Undefined symbols for architecture x86_64: "_main", referenced from: implicit entry/start for main executable ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

This is the code.

 #include <iostream>

int main() {
    std::cout << "Hello World";

    return 0;
}

Answer 1

Nihal, If you are doing this work for a course, you should search/ask for instructions on how to successfully install the required environment.

If you are self-teaching, you might consider starting with an environment like repl.it ( https://repl.it/ ). It's online, it's free, and if you ask it to create a C++ project for you, you will have everything you need to start with.

I use repl.it to teach my college-level C++ course. It works well for all the basic stuff, including file I/O.