#include?<stdio.h>
#include?<stdlib.h>
#include?<time.h>
int?main()
{
????char?gamer;??//?玩家出拳
????int?computer;??//?電腦出拳
????int?result;??//?比賽結果

????//?為了避免玩一次游戲就退出程序，可以將代碼放在循環中
????while?(1){
????????printf("這是一個猜拳的小游戲，請輸入你要出的拳頭：\n");
????????printf("A:剪刀\nB:石頭\nC:布\nD:不玩了\n");
????????scanf("%c%*c",&gamer);
???????switch?(gamer){
????????????case?65?|?97:??//?A?|?a
????????????????gamer=4;?break;
????????????case?66?|?98:??//?B?|?b
????????????????gamer=7;?break;
????????????case?67?|?99:??//?C?|?c
????????????????gamer=10;?break;
????????????case?68?|?100:??//?D?|?d
????????????????return?0;
???????????
????????????default:
????????????????printf("你的選擇為?%c?選擇錯誤,退出...\n",gamer);
????????????????getchar();
????????????????system("cls");?//?清屏
????????????????return?0;
????????????????break;
????????}
???????
????????srand((unsigned)time(NULL));??//?隨機數種子
????????computer=rand()%3;??//?產生隨機數并取余，得到電腦出拳
????????result=(int)gamer+computer;??//?gamer?為?char?類型，數學運算時要強制轉換類型
????????printf("電腦出了");
????????switch?(computer)
????????{
????????????case?0:printf("剪刀\n");break;?//4????1
????????????case?1:printf("石頭\n");break;?//7??2
???????????case?2:printf("布\n");break;???//10?3
????????}
????????printf("你出了");
????????switch?(gamer)
????????{
????????????case?4:printf("剪刀\n");break;
????????????case?7:printf("石頭\n");break;
????????????case?10:printf("布\n");break;
????????}
????????if?(result==6||result==7||result==11)?printf("你贏了!");
????????else?if?(result==5||result==9||result==10)?printf("電腦贏了!");
????????else?printf("平手");
????????system("pause>nul&&cls");??//?暫停并清屏
????}
????return?0;
}

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