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mrand48()

Generate a pseudo-random signed long integer

Synopsis:

#include <stdlib.h>

long mrand48( void );

Library:

libc

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

Description:

The mrand48() function uses a linear congruential algorithm and 48-bit integer arithmetic to generate a signed long integer uniformly distributed over the interval [-2³¹, 2³¹).

Call one of lcong48(), seed48(), or srand48() to initialize the random-number generator before calling drand48(), lrand48(), or mrand48().

The jrand48() function is a thread-safe version of mrand48().

Returns:

A pseudo-random long integer.

Classification:

POSIX 1003.1 XSI

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