one question :)

hello...
i wanted to ask what function i need to use to make my cmd type text like letter by letter :/
i know on bat it possible , i wanted to ask if on c prog. possible too? :)


another question;
i tried search way to make "if and else" work with letters lol but mm couldnt find ^_6

need help from u guys ;D
thanks :)

Quote:

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i wanted to ask what function i need to use to make my cmd type text like letter by letter :/
i know on bat it possible , i wanted to ask if on c prog. possible too?

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Do you mean like a typewriter one letter at a time rather than the whole line?
If so you could write a function that takes a parameter that is the phrase to write and then uses a loop to print each letter individualy using the loop control to change the array index. Put a timer/delay function in the loop and dont use '/n' until the end of the line.

Quote:

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i tried search way to make "if and else" work with letters lol but mm couldnt find ^_6

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are you encapsalating the letter in single quotes?

Code:

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char a = 'A'
if(a == 'A') // this should evaluate as true

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Quote:

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Originally Posted by Lesshardtofind

Do you mean like a typewriter one letter at a time rather than the whole line?
If so you could write a function that takes a parameter that is the phrase to write and then uses a loop to print each letter individualy using the loop control to change the array index. Put a timer/delay function in the loop and dont use '/n' until the end of the line.





are you encapsalating the letter in single quotes?

Code:

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char a = 'A'
if(a == 'A') // this should evaluate as true

---

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can u explain me please how to do the text timer thing :( im beginner and i like tosee how to do this :) i would appreciate for some example :) thnx a lot

There are timer libraries or the crudest fashion would be make the computer count to 1000 in between calls. I am not big on giving code because it leads to copy paste and not understanding what is going on. I dont even program C so u could call me a beginner as well. You just have to break down your goal into logical steps and remember google is your best friend. If you are about to ask a one setence question google the same question and see what pops up. I learn new functions libraries and implimentation everyday via google and a collection of books.

Quote:

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Originally Posted by mbtm0

what function i need to use to make my cmd type text like letter by letter :/

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Use fputc() (or putchar()) to output a single character, fflush() to make sure it is delivered to output (instead of cached by the C library), and sleep(), usleep(), or nanosleep() to delay between outputs.

Since you didn't mention your OS, you'd better first write a helper header file, msleep.h, to handle delays in milliseconds:

Code:

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#ifndef  MSLEEP_H
#define  MSLEEP_H

#ifdef _WIN32

/* Use Windows Sleep() function.
*/

#include <windows.h>

static void msleep(const unsigned int  milliseconds)
{
    return Sleep(milliseconds);
}

#else

/* Use Linux/BSD sleep() and/or usleep() function(s).
*/

#ifndef _BSD_SOURCE
#define _BSD_SOURCE 1
#endif
#include <unistd.h>

static void msleep(const unsigned int  milliseconds)
{
    if (milliseconds >= 1000U)
        sleep(milliseconds / 1000U);
    if (milliseconds % 1000U)
        usleep(1000UL * (milliseconds % 1000U));
}

#endif

#endif /* MSLEEP_H */

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Here is an example function that uses the above header file. It prints the given string to standard output, one character at a time, with the specified delay in milliseconds (thousands of a second) after each character:

Code:

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#include <stdio.h>
#include <string.h>
#include "msleep.h"

void slowput(const char *string, const unsigned int ms)
{
    /* Return immediately if NULL. */
    if (!string)
        return;

    /* Character loop. */
    while (*string != '\0') {

        /* Output character. */
        putchar(*string);
        fflush(stdout);

        /* Next character.. */
        string++;

        /* Wait before the next character. */
        msleep(ms);
    }

    return;
}

int main(int argc, char *argv[])
{
    unsigned int  milliseconds;
    char  dummy;
    int  arg;

    if (argc < 2 || !strcmp(argv[1], "-h") || !strcmp(argv[1], "--help") || !strcmp(argv[1], "/?")) {
        fprintf(stderr, "\nUsage: %s milliseconds string(s)..\n\n", argv[0]);
        return 1;
    }

    if (sscanf(argv[1], " %u %c", &milliseconds, &dummy) != 1) {
        fprintf(stderr, "%s: Invalid number of milliseconds.\n", argv[1]);
        return 1;
    }
    if (milliseconds < 1U) {
        fprintf(stderr, "%s: Milliseconds is too small. Use at least 1.\n", argv[1]);
        return 1;
    }

    for (arg = 2; arg < argc; arg++) {
        slowput(argv[arg], milliseconds);

        /* Append space; newline after last one. */
        if (arg < argc - 1)
            putchar(' ');
        else
            putchar('\n');
    }

    return 0;
}

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I also included the main() for an example program. It takes the delay between characters (integer milliseconds) as the first command-line parameter, and outputs the other command-line parameters using the slowput() function.

Compile it using e.g.

Code:

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gcc -W -Wall -O3 filename.c -o program

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and run via e.g.

Code:

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./program 100 'Hello, world!'

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