printf不在控制台上打印 [英] printf not printing on console

问题描述

我开始使用C语言。我使用eclipse（juno）作为我的IDE并安装了CDT插件。我也打包了mingw64（GCC编译器）。我写了一个非常简单的程序，看看它是否有效。这是我的代码：

  #include< stdio.h> 
 
 int main（）
 {
 int age; 
 printf（你好，请输入你的年龄：\\\
）; 
 scanf（％d，& age）; 
 printf（你的年龄是％d，年龄）; 
 return 0; 
} 
  

问题是输出缓冲区用第一个 printf ，但不会将其输出到控制台。我必须输入一个数字，只有缓冲区将所有的数据输入到控制台，所以我看到控制台这样的：

  1 
您好，请输入您的年龄：
您的年龄为1 
  

而不是预期的是：

 您好，请输入您的年龄：
 1 
您的年龄是1 
  

现在，我发现我可以使用 fflush（stdout） 在第一个 printf 之后，但我不认为这个解决方案是优雅甚至必要的。关于我如何克服这个的任何想法？

编辑 - 因为我正在我的大学学习，我不能使用课程中没有学到的东西，所以我可以 使用 printf 和 scanf

新编辑 - 我想我已经找到了解释。正如我所说，我输出到Eclipse中的控制台视图。奇怪的是，如果我从Windows的命令行编译并运行程序，我会得到想要的结果。因此，我认为eclipse实际上是将输出写入一个文件并将其显示在控制台窗口中。如何强制eclipse在运行配置中打开一个真正的命令行窗口？

解决方案

OK - 显然这是一个已知的错误的日食该错误通过WONT-FIX的解决方案得以解决。
不知道为什么。这里是链接：

Eclipse C控制台Bug < a>

I’m getting started in the C language. I am using eclipse (juno) as my IDE and installed CDT plugin. I have also unpacked mingw64 (GCC Compiler). I wrote a very simple program to see if it works. This is my code:

#include <stdio.h>

int main()
{
    int age;
    printf("Hello, please enter your age:\n");
    scanf("%d", &age);
    printf("Your age is %d", age);
    return 0;
}

The problem is that the output buffer is filled with the string value of the first printf but does not output it to the console. I have to enter a number, and only then the buffer pours all the data to the console so I see the console something like this:

1
Hello, please enter your age:
Your age is 1

instead of what is expected that is:

Hello, please enter your age:
1
Your age is 1

Now, I found that I can use fflush(stdout) after the first printf but I don't think that this solution is elegant and even necessary. Any ideas on how I can overcome this?

EDIT - because I'm learning this in my university, I can't use anything that wasn't learned in the course so I can only use printf and scanf

NEW EDIT - I think I have found an explanation for this. As I said, I am outputting to the console view inside Eclipse. The strange thing is that if I compile and run the program from the command line of Windows, I get the wanted result. Therefore, I think that eclipse is actually writing the output to a file and presenting it in the console window. How can I force eclipse to open a real command line window in my run configurations?

解决方案

OK - apparently this is a known bug of eclipse. This bug is resolved with the resolution of WONT-FIX. have no idea why though. here is the link:
Eclipse C Console Bug

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