kbhit 产生随机数

#include <conio.h>void main() {    int r,k;    cprintf("Press any key to get a real random number(0..99) ...");    r=0;    while (1) {        r=(r+1)%100;        if (kbhit()) {            k=getch();            if (0==k || 0xe0==k) getch();            break;        }    }    cprintf("\r\n%d\r\n",r);}