尝试从命令行获取星号*作为主输入 [英] Trying to get an asterisk * as input to main from command line

问题描述

我尝试从命令行发送输入到我的主要功能。然后将输入发送到函数checkNum等。

  int main（int argc，char * argv []）
 {
 
 int x = checkNum（argv [1]）; 
 int y = checkNum（argv [3]）; 
 int o = checkOP（argv [2]）; 
 ... 
} 
  

它应该是一个计算器，当我写命令行时：

  program.exe 4 + 2 
  pre> 
 
 
它会给我答案6（这个代码不包括在内）。
 
 
 
是我想要乘法，我输入例如
  program.exe 3 * 4 
  
它似乎创建一个指针（或某事，不太确定），而不是给我的char指针的字符'<$ c $问题是我可以得到输入' *  
 '的行为方式，当我输入'+'？ 
 
 
 
编辑：在命令行中编写*是否有一种方式，我只需要键入 * ？
 
 
 
代码运行在Windows上， 
解决方案
如果你不想使用单引号（'）或双引号（）。
 
 
 
 
 ＃set -o noglob 
  
或
 ＃set -f 
  pre> 
 
 
（两者都是等效的）。
 
 
 
关闭shell的globbing。 t展开任何glob，包括 * 。
 
I'm trying to send input from the command line to my main function. The input is then sent to the functions checkNum etc.
int main(int argc, char *argv[])
{

    int x = checkNum(argv[1]);
    int y = checkNum(argv[3]);
    int o = checkOP(argv[2]);
    …
}
It is supposed to be a calculator so for example in the command line when I write:
program.exe 4 + 2
and it will give me the answer 6 (code for this is not included).

The problem is when I want to multiply and I type for example
program.exe 3 * 4
It seems like it creates a pointer (or something, not quite sure) instead of giving me the char pointer to the char '*'.

The question is can I get the input '*' to behave the same way as when I type '+'? 

Edit: Writing "*" in the command line works. Is there a way where I only need to type *?

The code is running on Windows, which seems to be part of the problem.
解决方案
You can turn off the shell globbing if you don't want to use single quote (') or double quote (").

Do
# set -o noglob 
or 
# set -f 
(both are equivalent). 

to turn off the shell globbing. Now, the shell won't expand any globs, including *.

                        
这篇关于尝试从命令行获取星号*作为主输入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！