cout上没有控制台输出 [英] No console output on cout

问题描述

早上好，

我有一个针对C / C ++开发人员的Eclipse IDE问题。

写一个smal工具转换字符串。虽然在某些点测试 eclipse停止给予控制台输出。
例如：

cout<<test;

不显示。 >

但它不是每个地方...另一个例子：

 路径作为参数
 int main（int argc，char * argv []）{
 if（argc！= 2）{
 cout 
& 错误：参数数量错误！只有一个允许... \\\
; 
 cout<< \\\
< 程序关闭... \\\
\\\
; 
 exit（1）; 
} 
 
 CommandConverter a（argv [1]）; 
 cout<<test; 
 a.getCommandsFromCSV（）; 
 cout<<test2; 
 
 return 0; 
} 
  

如果参数丢失，错误消息正确显示。
但是如果参数存在并且程序继续测试输出：

cout< >
cout<<test2;

不显示...

解决方案

/ div>

您需要使用换行符结束输出字符串，例如：`cout< test\\\
``。原因是标准输出被缓冲，并且缓冲区在换行符上被刷新。可能存在一种方法来刷新cout缓冲区，而不输出换行符，但我不知道它的心。可能包括访问底层的streambuf（通过rdbuf方法）。

Good morning,

I have a problem with Eclipse IDE for C/C++ Developers.

I'm writting a smal tool for converting Strings. While testing on some point eclipse stopped to give console output. e.g.:
cout<<"test";
doesn't get displayed.

But it's not every where... another example:

// File path as argument
int main(int argc, char* argv[]) {
if (argc != 2) {
    cout
            << "ERROR: Wrong amount of arguments! Only one allowed...\n";
    cout << "\n" << "Programm closed...\n\n";
    exit(1);
}

CommandConverter a(argv[1]);
cout<<"test";
a.getCommandsFromCSV();
cout<<"test2";

return 0;
}

The error message is displayed correctly if the argument is missing. But if the argument is there and the program continues the test outputs:

cout<<"test";
cout<<"test2";

are not displayed...
I am missing something obvious?

Thanks in advance!

解决方案

You need to end output strings with newline, e.g.: `cout << "test\n"``. The reason is that the standard output is buffered and the buffer is flushed on newline. There probably exists a way to flush the cout buffer without outputting a newline, but I don't know it by heart. Probably includes access to the underlying streambuf (via the rdbuf method).

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