Generate a pseudo-random signed long integer
#include <stdlib.h> long mrand48( void );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
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().
A pseudo-random long integer.
| Safety: | |
|---|---|
| Cancellation point | No |
| Interrupt handler | No |
| Signal handler | No |
| Thread | No |