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printf() Question

This is a discussion on printf() Question within the C Programming forums, part of the General Programming Boards category; Hello, everyone. How do I use the printf() function to print the following (only the part between double quotes) and ...

  1. #1
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    printf() Question

    Hello, everyone. How do I use the printf() function to print the following (only the part between double quotes) and then wait for input over the __ part, but without deleting it before the actual input?

    "Please enter an integer: __"

    Thanks in advance!

  2. #2
    SAMARAS std10093's Avatar
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    I would say that this is not possible in standard C...
    Code - functions and small libraries I use


    It’s 2014 and I still use printf() for debugging.


    "Programs must be written for people to read, and only incidentally for machines to execute. " —Harold Abelson

  3. #3
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    You could try something like this (but add error checking to scanf()):

    Code:
    #include <stdio.h>
    
    int main(void)
    {
        printf("Go: __\b\b");
        fflush(stdout);
    
        int i;
        scanf("%d", &i);
        printf("Got: %d\n", i);
    }
    On the other hand, I wouldn't bother - it's more "normal" for people to see a prompt with no underscores when typing at a terminal, and going along the path of least surprise for your users is always a good thing.
    iMalc likes this.
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    ~~~

    "The largest-scale pattern in the history of Unix is this: when and where Unix has adhered most closely to open-source practices, it has prospered. Attempts to proprietarize it have invariably resulted in stagnation and decline."

    Eric Raymond, The Art of Unix Programming

  4. #4
    SAMARAS std10093's Avatar
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    Apparently I was wrong
    Thanks John
    Code - functions and small libraries I use


    It’s 2014 and I still use printf() for debugging.


    "Programs must be written for people to read, and only incidentally for machines to execute. " —Harold Abelson

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