error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup
2013-03-21 15:03
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一、问题描述:
error LNK2019: unresolved external symbol _WinMain@16 referenced in function ___tmainCRTStartup二、产生原因:
1. 你用vc建了一个控制台程序,它的入口函数应该是main, 而你使用了WinMain.2. 你用vc打开了一个.c/.cpp 文件,然后直接编译这个文件,这个文件中使用了WinMian而不是main作为入口函数。vc这时的默认设置是针对控制台程序的。
三:解决方案:
1、使用main函数
Project->Properties->C/C++->Preprocessor->Preprocessor Definitions 删除_WINDOWS,添加_CONSOLEProject->Properties->Linker->System->SubSystem 选择Console (/SUBSYSTEM:CONSOLE)
2、使用WinMain函数
Project->Properties->C/C++->Preprocessor->Preprocessor Definitions 删除_CONSOLE,添加_WINDOWSProject->Properties->Linker->System->SubSystem 选择Windows (/SUBSYSTEM:WINDOWS)
(VS2010测试环境)
操作系统装载应用程序后,做完初始化工作就转到程序的入口点执行。程序的默认入口点实际上是由链接程序设置的,不同的链接器选择的入口函数也不尽相 同。
在VC++下,
链接器对控制台程序设置的入口函数是 mainCRTStartup,mainCRTStartup 再调用你自己编写的 main 函数;
对图形用户界面(GUI)程序设置的入口函数是 WinMainCRTStartup,WinMainCRTStartup 调用你自己写的 WinMain 函数。
而具体设置哪个入口点是由连接器的“/subsystem:”选项参数确定的,它告诉操作系统如何运行编译生成的.EXE文件。
可以指定四种方 式:“CONSOLE|WINDOWS|NATIVE|POSIX”
如果这个选项参数的值为“WINDOWS”,则表示该应用程序运行时不需要控制台,有 关连接器参数选项的详细说明请参考 MSDN 库。 以下四种组合,可以实现console和windows模式的混合,可以达到不弹出DOS窗口的效果,也可以达到在Windows程序中向控制台输出printf信息了。
#pragma comment( linker, "/subsystem:windows /entry:WinMainCRTStartup" ) #pragma comment( linker, "/subsystem:windows /entry:mainCRTStartup" ) #pragma comment( linker, "/subsystem:console /entry:mainCRTStartup" ) #pragma comment( linker, "/subsystem:console /entry:WinMainCRTStartup" ) int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { // ... ... } int main(void) { // ... ... }
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