随机数

srand(time(NULL));
printf("%dn",rand());

int t=100;
srand(time(NULL));
printf("%dn",rand()%t);

srand(time(NULL));
printf("%.6lfn",rand()*1.0/100);

int len=100;
srand(time(NULL));
while(len--)
{
    printf("%cn",'A'+rand()%26);
}