程序代码：

#include <stdio.h>
#include <stdlib.h>//为srand（）函数提供原型
#include <time.h>//为time（）函数提供原型
#include "diceroll.h"//为roll_n_dice()和roll_count函数提供原型
int main(void)
{
    int dice,roll;
    int sides;
    srand((unsigned int)time(0));//随机化种子
    printf("Enter the number of sides per die,0 to stop.\n");
    while(scanf("%d",&sides)==1&&sides>0)
    {
        printf("玩几次？dice\n");
        scanf("%d",&dice);
        roll=roll_n_dice(dice,sides);
        printf("You have rolled a %d using %d %d-sided dice.\n",roll,dice,sides);
        printf("How many sides?Enter 0 to stop.\n");
    }
    printf("The rollem()function was called %d times.\n",roll_count);
    printf("GOOD FORTUNE TO YOU!\n");
    return 0;
}

程序代码：

//掷骰子的模拟程序
#include "diceroll.h"
#include <stdio.h>
#include <stdlib.h>//为rand（）函数提供类库
int roll_count=0;
static int rollem(int sides)
{
    int roll;
    roll= rand()%sides +1;
    ++roll_count;
    return 0;
}
int roll_n_dice(int dice,int sides)
{
    int d;
    int total=0;
    if(sides<2)
    {
        printf("至少需要使用2面骰子\n");
        return -2;
    }
    if(dice<1)
    {
        printf("好歹玩一次呗！\n");
        return -1;
    }
    for(d=0;d<dice;d++)
        total += rollem(sides);
    return total;

}

extern int roll_count;
int roll_n_dice(int dice,int sides);