Visual Studio 2012 C ++ Hello World-iostream无法正常工作 [英] visual studio 2012 c++ hello world - iostream not working

问题描述

我在Visual Studio 2012上遇到问题.我还使用山姆一天一次自学C ++，第7版".

I have an issue with Visual Studio's 2012. I am also using "Sams Teach Yourself C++ in One Hour a day, 7th edition".

在使用google查找C ++的最佳"编译器之后，Visual Studios似乎是首选工具.

After using google to find the "best" compilers for C++, Visual Studios seemed to be the tool of choice.

因此，我下载并安装了Visual Studios2012.这本书的第一节课是(并通过转到文件>新建>项目> Visual C ++> Win32>控制台应用程序，告诉我将其作为控制台应用程序运行)

So I downloaded and installed Visual Studios 2012. The very first lesson in the book is (and tells me to run it as a console app by going to File > New > Project >Visual C++ > Win32 > Console Application )

 #include <iostream>

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

这根本不起作用.它会输出类似以下内容的错误消息:

which doesnt work, at all. it outputs an error message similiar to the following:

1> c:\ users \ nik \ documents \ visual studio 2012 \ projects \ consoleapplication4 \ consoleapplication4 \ consoleapplication4.cpp(8): 错误C2065:"Hello":未声明的标识符 1>正在生成代码... ===========构建:0成功，1失败，0最新，跳过0 =========="

1>c:\users\nik\documents\visual studio 2012\projects\consoleapplication4\consoleapplication4\consoleapplication4.cpp(8): error C2065: '"Hello' : undeclared identifier 1> Generating Code... ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped =========="

(有更多的行与第一行相似，但相当长)

(there is more lines similiar to the first, but its rather long)

但是，在Google上谷歌搜索并观看视频后，以下代码有效(使用文件>新建>项目> Visual C ++>常规>空项目)

However, after googling and watching a video on youtube the following code works (using File > New > Project >Visual C++ > General > Empty Project )

#include <iostream>
#include "conio.h"

using namespace std;

int main() {
cout << "Hello Nik" << endl;
_getch();

return 0;
}

Visual Studio 2012是否具有C ++编译器?还是只是有一个可视化的c ++编译器(如果这甚至是问题，我认为可能的唯一原因是我可以看到Visual C ++的模板，但自己看不到c ++的模板...)还是我需要下载Visual Studio Express?下载本机c ++ ??

Does Visual Studio's 2012 have a C++ compiler? or does it just have a visual c++ compiler (if thats even the issue, only reason I think it could be is I can see templates for Visual C++ but none for c++ by itself...) or do I need to download Visual Studio Express to download native c++ ??

任何帮助都将不胜感激，因为我在这里感到有些不适...

Any help would be greatly appreciated as I am feeling some-what out of my depth here...

谢谢.

推荐答案

除了憎水剂，您可能需要在项目属性中禁用预编译头.

在VS2012中默认情况下将它们打开.如果您不熟悉预编译的标头，请关闭它们.

They are turned on by default in VS2012. If you are not familiar with precompiled headers turn them off.

1. 右键单击项目(不是解决方案)
2. 点击属性.
3. 展开配置属性"
4. 展开"C/C ++"
5. 选择预编译头"
6. 将预编译头"设置为不使用预编译头"

有关预编译标头和Wikipedia上stdafx.h文件的更多信息

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