r_drive1.c

c primer plus 第五版 的源代码

/* r_drive1.c -- test rand1() and srand1() */
/* compile with s_and_r.c                  */
#include <stdio.h>
extern void srand1(unsigned int x);
extern int rand1(void);

int main(void)
{
    int count;
    unsigned seed;

    printf("Please enter your choice for seed.\n");
    while (scanf("%u", &seed) == 1)
    {
        srand1(seed);    /* reset seed */
        for (count = 0; count < 5; count++)
            printf("%hd\n", rand1());
        printf("Please enter next seed (q to quit):\n");
    }
    printf("Done\n");

    return 0;
}