vc6 getline 两个回车bug解决

The Standard C++ Library templategetlinefunction reads an extra character after encountering the delimiter. Please refer to the sample program in the More Information section for details.

RESOLUTION

Modify thegetlinemember function, which can be found in the following system header file string, as follows:

else if (_Tr::eq((_E)_C, _D))
{_Chg = true;
//  _I.rdbuf()->snextc(); /* Remove this line and add the line below.*/
_I.rdbuf()->sbumpc();
break; }

NoteBecause the resolution involves modifying a system header file, extreme care should be taken to ensure that nothing else is changed in the header file. Microsoft is not responsible for any problems resulting from unwanted changes to the system header files.

Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section. This problem was corrected in Microsoft Visual C++ .NET.

The following sample program demonstrates the bug:

//test.cpp
//Compiler options : /GX
#include <string>
#include <iostream>
int main () {
std::string s,s2;
std::getline(std::cin,s);
std::getline(std::cin,s2);
std::cout << s <<'\t'<< s2 << std::endl;
return 0;
}
Actual Results:
Hello<Enter Key>
World<Enter Key>
<Enter Key>
Hello   World
Expected Results:
Hello<Enter Key>
World<Enter Key>
Hello   World
我给大家解释下意思吧:症状:
c++的标准库模板函数getline在读到限定符后还要读取额外字符...

解决方法:
else if (_Tr::eq((_E)_C, _D))
                 {_Chg = true;
               //  _I.rdbuf()->snextc(); /* 把这一行注释掉,添加下一行.*/
     _I.rdbuf()->sbumpc();
                 break; }
修改系统头文件时大家要小心点...

现状:
微软已经确认这是他们产品中的'臭虫'(bug),这个bug已经在Microsoft Visual C++ .NET得到修正.