_lrand

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Header File

stdlib.h

Category

Math Routines

Prototype

long _lrand(void);

Description

_lrand is the long random number generator function. _rand uses a multiplicative congruential random number generator with period 2^64 to return successive pseudo-random numbers in the range from 0 to 2^31 - 1.

The generator is reinitialized by calling srand with an argument value of 1. It can be set to a new starting point by calling srand with a given seed number.

Example

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

int main(void)
{
  long i;
  randomize();

  printf("Ten random numbers from 0 to 99\n\n");

  for(i=0; i<10; i++)
    printf("%d\n", _lrand() % 100);

  return 0;
}