C: How I can write my own printf() function ?

Question

Write your own rand function which returns random numbers in a given range(input) so that the numbers in the given range is equally likely to appear.

Answer 1

You can use variable argument list.
Try to check for va_list, va_start(), va_end()

Here is a sample program

#include <stdio.h>
#include <stdarg.h>

int my_printf(char* format, ...)
{
    va_list arg;
    int ret =0;

    va_start(arg, format);

    ret = vfprintf(stderr, format, arg);
    va_end(arg);

    return ret; 
}

int main()
{
    my_printf("Welcome to QueryHome\n");

    return 0;
}