Thread: prompt user for input and display character in every line

  1. #1
    Registered User
    Join Date
    Mar 2013

    prompt user for input and display character in every line

    hi im having problems printing "->" on the beginning of each line, im trying to do it as a loop and ending it when the user types "q". also i would like to know how to ignore text from the user when the input begings with a specific character. heres what ive done so far, and not currrently working as expected.

    #include <stdio.h>
    int main (void)
    char prompt;
    printf("~~~ FRACTION CALCULATOR ~~~\n");
    prompt; getchar();
    while (prompt !='q')
    return 0;

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Consider something like
    char *doPrompt ( const char *prompt, char *buff, size_t buffsize ) {
        return fgets( buff, buffsize, stdin );
    int main ( ) {
        char buff[BUFSIZ];
        while ( doPrompt("> ", buff, BUFSIZ ) ) {
            printf("Response=%s", buff);
        return 0;
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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