【 tulaoshi.com - 编程语言 】
/*1.从同一个种子开始*/
#include stdio.h
#include conio.h
static unsigned long int next=1;int rand0(void)
{
next=next*1103515245+12345;
return (unsigned int)(next/65536)%32768;
}int main(void)
{
int count;for(count=0;count5;count++)
printf("%hd",rand0());
getch();
return 0;
}/*2.重置种子*/
#include stdio.h
#include conio.h
static unsigned long int next=1;int rand1(void)
{
next=next*1103515245+12345;
return (unsigned int)(next/65536)%32768;
}void srand1(unsigned int seed)
{
next=seed;
}int main(void)
{
int count;
unsigned int seed;printf("please input seed:");
scanf("%u",&seed);
srand1(seed);
for(count=0;count5;count++)
printf("%hd",rand1());
getch();
return 0;
}/*3.利用利用时钟产生种子
ANSI C程序库提供了rand()函数来产生随机数；
ANSI C程序库提供了srand()函数来产生种子；
ANSI C程序库提供了time()函数返回系统时间。
*/
#include time.h
#include stdio.h
#include dos.h
#include conio.h
#include stdlib.hint main(void){
int i;
time_t t;
clrscr();
t = time(NULL);
srand((unsigned) t);
for(i=0; i10; i++) printf("%d", rand()%10);
getch();
return 0;
}
