Xcode STL C ++ Debug编译错误 [英] Xcode STL C++ Debug compile error

问题描述

代码：

我有一些文件编写代码工作正常，但打印错误在调试模式，没有输出错误。 strong>

  #include< iostream> 
 #include< string> 
 #include< fstream> 
 #include< sstream> 
 
 using namespace std; 
 
 int main（int argc，char * const argv []）{
 string cppfilename; 
 std :: cout<< 请输入要创建的文件名：; 
 
 while（cppfilename ==）{
 getline（cin，cppfilename）; //错误出现在这里
} 
 
 cppfilename + =.txt; 
 ofstream fileout; 
 fileout.open（cppfilename.c_str（））; 
 fileout< 将此文件写入file.\\\
; 
 fileout.close（）; 
 
 return 0; 
} 
  

调试输出：

请输入要创建的文件名：运行...
myfile
FileIO（5403）malloc：***错误对象0xb3e8：指针被释放
***在malloc_error_break中设置断点以调试
创建：myfile.txt


发布输出：

  FileIO实现C ++ 
输入要创建的文件名：Running ... 
 myfile 
创建：myfile.txt 
  

除了不检查文件描述符是否打开（为了简单）这个代码有什么问题？

更新：下面的代码仍然存在错误：

  string cppfilename; 
 getline（cin，cppfilename）; //错误在这里
  

解决方案

这看起来是另一种情况 _GLIBCXX_DEBUG在Mac OS X上使用gcc 4.2中断。

您最好的选择是删除_GLIBCXX_DEBUG或切换到gcc 4.0。

I have some file writing code that works as expected, but prints an error on Debug mode, no output errors in Release.

Code:

#include <iostream>
#include <string>
#include <fstream>
#include <sstream>

using namespace std;

int main (int argc, char * const argv[]) {
    string cppfilename; 
    std::cout << "Please enter the filename to create: ";

    while ( cppfilename == "" ) {
        getline(cin, cppfilename);    // error occurs here
    }

    cppfilename += ".txt";
    ofstream fileout;
    fileout.open( cppfilename.c_str() );
    fileout << "Writing this to a file.\n"; 
    fileout.close();

    return 0;
}

Debug Output:

Please enter the filename to create: Running…
myfile
FileIO(5403) malloc: *** error for object 0xb3e8: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug
Created: myfile.txt

Release Output:

FileIO implementation C++
Please enter the filename to create: Running…
myfile
Created: myfile.txt

Aside from not checking for the file descriptor being open (for simplicity) what is wrong with this code?

Update: I broke the code down to the following and it still errors:

 string cppfilename; 
 getline(cin, cppfilename);    // error here

解决方案

This looks to be another case of _GLIBCXX_DEBUG being broken with gcc 4.2 on Mac OS X.

Your best options look to be to drop _GLIBCXX_DEBUG or to switch to gcc 4.0.

这篇关于Xcode STL C ++ Debug编译错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！