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rand()

Generate a pseudo-random integer

Synopsis:

#include <stdlib.h>

int rand( void );

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The rand() function computes a pseudo-random integer in the range 0 to RAND_MAX. You can start the sequence at different values by calling srand().

The rand_r() function is a thread-safe version of rand().

Returns:

A pseudo-random integer.

Examples:

#include <stdio.h>
#include <stdlib.h>

int main( void )
{
    int i;

    for( i=1; i < 10; ++i ) {
        printf( "%d\n", rand() );
    }
    
    return EXIT_SUCCESS;
}

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	No