Question

所以我对c ++很新，我用代码块编写了这个程序：

#include<iostream>

using namespace std;

int main()
{
    cout << "Hello World!" << endl;
    return 0;
}

当我构建它时运行它，我得到一个错误。这是构建日志：

-------------- Build: Debug in HelloWorld (compiler: GNU GCC Compiler)---------------

mingw32-g++.exe  -o bin\Debug\CPP_1.exe obj\Debug\main.o   
obj\Debug\main.o:crt1.c:(.text+0x280): multiple definition of `mainCRTStartup'
c:/programfiles(x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../crt2.o:crt1.c:(.text+0x280): first defined here
obj\Debug\main.o:crt1.c:(.text+0x2a0): multiple definition of `WinMainCRTStartup'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../crt2.o:crt1.c:(.text+0x2a0): first defined here
obj\Debug\main.o:crt1.c:(.text+0x2c0): multiple definition of `atexit'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../crt2.o:crt1.c:(.text+0x2c0): first defined here
obj\Debug\main.o:crt1.c:(.text+0x2d0): multiple definition of `_onexit'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../crt2.o:crt1.c:(.text+0x2d0): first defined here
obj\Debug\main.o:cygming-crtbegin.c:(.text+0x2e0): multiple definition of `__gcc_register_frame'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/crtbegin.o:cygming-crtbegin.c:(.text+0x0): first defined here
obj\Debug\main.o:cygming-crtbegin.c:(.text+0x32c): multiple definition of `__gcc_deregister_frame'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/crtbegin.o:cygming-crtbegin.c:(.text+0x4c): first defined here
obj\Debug\main.o:crt1.c:(.bss+0x4): multiple definition of `_argc'
c:/program files  (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../crt2.o:crt1.c:(.bss+0x4):first defined here
obj\Debug\main.o:crt1.c:(.bss+0x0): multiple definition of `_argv'
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../crt2.o:crt1.c:(.bss+0x0): first defined here
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/crtbegin.o:cygming-crtbegin.c:(.text+0x45): undefined reference to `_Jv_RegisterClasses'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 1 second(s))
13 error(s), 0 warning(s) (0 minute(s), 1 second(s))

我根本无法弄清楚它为什么不起作用。如果有人能帮助我，我会非常感激。

Answer 1

我遇到了同样的问题 - 事实证明这是一个不使用-o name.exe指定输出的错误情况如果编译器在其移交的源文件中找到一个二进制文件，那么它就会抛出一个特定的错误 - 而是尝试将它用作某个库 - 当它发现两次出现main和所有内容时出错。

C ++：`mainCRTStartup＆＃39;的多重定义错误等

1 个答案: