随机洗牌程序 C源代码

/* Shuffle cards*/ #include<stdio.h> #include<stdlib.h> #include<time.h> int card[2][52]; void CreateCards() { int i; for(i=0;i<52;++i) { card[0][i]=1+i%13;//store the value of cards card[1][i]=(int)(i/13);//store the type of cards } } void ShowCards() { int i; int value,type; for(i=0;i<52;++i) { switch(card[0][i]) { case 1: card[0][i]=65; break;//transform"1" to "A" case 11:card[0][i]=74; break;//transform"11"to "J" case 12:card[0][i]=81; break; case 13:card[0][i]=75; break; default:card[0][i]=card[0][i]; } switch(card[1][i]) { case 0: card[1][i]=83; break;//transform"type1"to"spades" case 1: card[1][i]=72; break;//transform"type2"to"hearts" case 2: card[1][i]=67; break;//transform"type3"to"clubs" case 3: card[1][i]=68; break;//transform"type4"to"diamands" } value=card[0][i]; type =card[1][i]; if(value > 13) printf("%c%c ",value,type); else printf("%d%c ",value,type); } puts("\n"); } void ShuffleCards(int times)//times is the times of shuffle { int i,Pos1,Pos2,tempv=0,tempt=0; //Shuffle method:switch cards in Pos1 and Pos2. for(i=0;i<=times;++i) { Pos1 = (int)rand()%52; Pos2 = (int)rand()%52; tempv = card[0][Pos1]; tempt = card[1][Pos1]; card[0][Pos1] = card[0][Pos2]; card[1][Pos1] = card[1][Pos2]; card[0][Pos2] = tempv; card[1][Pos2] = tempt; } } int main() { int times; srand(time(NULL)); printf("Unshuffled cards:\n"); CreateCards(); ShowCards(); printf("Please input the shuffle times(to make an efficient shuffle,try times>=50):"); scanf("%i",&times); puts("shuffling..."); ShuffleCards(times); ShowCards(); return 0; }