linux bash command prompt access with c++

This is a discussion on linux bash command prompt access with c++ within the C++ Programming forums, part of the General Programming Boards category; How can I control the command prompt with c++ in linux? I am using bash. For learning, I am trying ...

  1. #1
    Registered User
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    Jun 2008
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    linux bash command prompt access with c++

    How can I control the command prompt with c++ in linux? I am using bash.

    For learning, I am trying to make a rotating bar using | \ - / characters

    print |
    erase
    print \
    erase
    print -
    erase
    print /

    ...and this would be looped

    I just need to know how to stream to the command prompt and how to erase characters

  2. #2
    Registered User
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    Dec 2005
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    Canada
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    OS: Windows 7, XUbuntu 11.10, Arch Linux
    IDE: CodeBlocks
    Compiler: GCC

  3. #3
    Deathray Engineer MacGyver's Avatar
    Join Date
    Mar 2007
    Posts
    3,211
    One possible way to erase, would be to type a '\b' char and then overwrite. It's not the best necessarily, but it's the most portable to try (although it may or may not work). Something like this:

    Code:
    #include <iostream>
    
    void doIter();
    
    void doIter()
    {
    	char szIter[] = {'|', '/', '\\', '-'};
    	
    	for(size_t i=0;i<sizeof(szIter)/sizeof(*szIter);i++)
    	{
    		putchar(szIter[i]);
    		putchar('\b');
    	}
    }
    
    int main()
    {
    	for(size_t i=0;i<5000;i++)
    	{
    		doIter();
    	}
    	
    	return 0;
    }
    Last edited by MacGyver; 06-30-2008 at 10:35 AM.

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