random

How Can I random two digits?????

Please help me!!!!!!

re: random

I think you have some words missing from that question :D

However the C standard library provides 2 routines for getting random values

srand - this seeds the random number generator, often called as

srand(time(NULL));

rand - this returns a value bwteen 0 and RAND_MAX, you will need to scale the return value to the range you require.

re: random

But I need only two digits for example:

sometimes it shows 35 and sometimes it shows 45

re: random

Then make the range from 00 to 99, i.e. multiply the random value by 100, or take it modulo 100, depending on the range of the random value.

re: random

Can You Give Me The Source?

re: random

hi
may be this will help u out

/* rand example */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main ()
{
/* initialize random generator */
srand ( time(NULL) );

/* generate some random numbers */
printf ("A number between 0 and RAND_MAX (%d): %d\n", RAND_MAX, rand());
printf ("A number between 0 and 99: %d\n", rand()%100);
printf ("A number between 20 and 29: %d\n", rand()%10+20);

return 0;
}

Output:
A number between 0 and RAND_MAX (32767): 30159
A number between 0 and 99: 72
A number between 20 and 29: 23


A good way to generate almost-true random numbers is to initialize the random algorithm using srand with the current time in seconds as parameter, as obtained from time function included in <time.h>.
And, generally, a good way to get an integer random number between a range is to perform a module (%) operation on a result provided by rand():

thus rand()%25 would be a random number between 0 and 24, both included.