C language implementation of the rock-paper-scissors game

code show as below:

//(It runs normally under linux! It may be garbled when running under windows!)

/**************************************************** ************
*Function: Realize the rock-paper-scissors game in C language
*Author: lml Time: April 17, 2020 11:41:57
*********** ***************************************************** */

#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>

int do_Compare(int us);

void do_Menu()
{ system("clear"); // clear screen printf("****************************** *************** \n"); printf(" ~~~~~~~ _{Welcome to rock-paper-scissors} ~~~~~~~ \n"); printf(" If you If I win, I will tell you a story! \n"); printf(" ********************************* *****************\n"); }

int do_Game()
{ int i=0,j=0; int us=0,res=0; char user[20]=""; while(1){ char num[2]=""; printf("Please punch(scissors: 1 rock: 2 cloth: 3 exit: 9): "); fflush(stdout); scanf("%s",num);

	//判断输入是否有误
	if((num[0]<'1' || num[0]>'9') || (num[0] >'3' && num[0]<'9') || num[1]!='\0'){
		printf("输入错误啦!\n");
		continue;
	}
	//退出
	us = atoi(num);
	if(us == 9){
		printf("游戏已退出!\n");
		exit(1);
	}
	//判断用户输入的是什么
	if(us == 1){
		strcpy(user,"剪刀");
	}else if(us == 2){
		strcpy(user,"石头");
	}else{
		strcpy(user,"布");
	}
	printf("你出的是:%s\n",user);

	//调用判断函数
	res = do_Compare(us);

	//分析结果
	if(res == 0){
		printf("哎呀呀，平局了!\n");
	}else if(res == 1){
		printf("哇塞，你赢了，好厉害啊！\n");
		//do_story(); //这里赢了可以调用打印故事的函数，博主就不做了
	}else{
		printf("哎呀，你输了，再接再厉！\n");
	}
}
return 0;

}

int do_Compare(int us)
{ int ra=0; char pc[20]=""; srand((unsigned)time(0)); ra = rand()%3 +1;//Random 1~3 Number, scissors 1 rock 2 cloth 3; if(ra == 1){ strcpy(pc,"scissors"); }else if(ra == 2){ strcpy(pc,"rock"); }else{ strcpy( pc, "cloth"); } printf("The output from the computer is: %s\n", pc);

//平局的情况
if(ra == us){
	return 0; //返0是平局回
}

//不平局的情况
if(ra == 1){
	if(us == 2){
		return 1; //返回1表示用户胜利，
	}else{
		return -1;//返回1是用户失败。
	}
}
if(ra == 2){
	if(us == 3){
		return 1;
	}else{
		return -1;
	}
}
if(ra == 3){
	if(us == 1){
		return 1;
	}else{
		return -1;
	}
}

}

int main(int argc, const char *argv[])
{
do_Menu();
do_Game();
return 0;
}

Finish.