Fixing multiple definition of 'main' when running C in VS Code-CodePudding

I am using VS Code version 1.62.0 (user setup)

I am trying to run a basic program in C (test.c):

#include <stdio.h>
#include <stdlib.h>

int main() {
    printf("Hello");
    return 0;
}

I am trying to run by clicking Play Sign (CTRL ALT N) but it turns like this in terminal:

PS C:\Users\X\Dropbox\My PC_X\Downloads> cd "c:\Users\X\Dropbox\My PC_X\Downloads\est\" ; if ($?) { g   test.c *.c  -o test } ; if ($?) { .\test }
C:\Users\X\AppData\Local\Temp\ccyBS6yO.o:test.c:(.text 0x0): multiple definition of `main'
C:\Users\X\AppData\Local\Temp\ccwvYj0K.o:test.c:(.text 0x0): first defined here
collect2.exe: error: ld returned 1 exit status

I don't know if this information helps. For your information, I am using Windows 11 (Which in my case I think are really broken). Previously, I sync [Desktop, Documents, Picture] with OneDrive (OneDrive becomes my Local Folder). But two days ago, I turn off sync for Documents and some documents go fully in OneDrive (Not necessarily in my Local Folder) [To make it more clear, look at the picture]

Here's my gcc version:

gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Here's my task.json:

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "cppbuild",
            "label": "C/C  : gcc.exe build active file",
            "command": "C:\\MinGW\\bin\\gcc.exe",
            "args": [
                "-fdiagnostics-color=always",
                "-g",
                "${file}",
                "-o",
                "${fileDirname}\\${fileBasenameNoExtension}.exe"
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": "build",
            "detail": "compiler: C:\\MinGW\\bin\\gcc.exe"
        }
    ]
}

CodePudding user response：

if ($?) { g   test.c *.c  -o test }

Ah, so after expansion of *.c you run

g   test.c test.c  -o test

so, as the error message says, you've got main defined twice - in the two copies of test.c. So, remove the *.c from your build job.

CodePudding user response：

that came from your config of the IDE, you are trying to compile your file and then all .c files and so the first one included so it have 2 main since you compile twice the same file

 g   test.c *.c  -o test