1042. Shuffling Machine (20)

本文介绍了一种基于数组变换的纸牌洗牌算法,并详细展示了如何通过输入次数进行特定的纸牌位置变换,最终输出变换后的纸牌序列。
#include<iostream>
#include<algorithm>
#include<vector>
#include<map> 
#include<string>
#include<set>
using namespace std;
const int MAX = 54;
char Front(int n){
	if(n / 13 == 0){
		return 'S';
	}
	else if(n / 13 == 1){
		return 'H';
	}
	else if(n / 13 == 2){
		return 'C';
	}
	else if(n / 13 == 3){
		return 'D';
	}
	else{
		return 'J';
	}
} 
int main(){
	int k;
	int ch[MAX];//变换矩阵 
	int af[MAX];//变换后的矩阵
	cin>>k;
	for(int i = 0; i < MAX; i++){
		cin>>ch[i];
		ch[i]--;
	} 
	for(int i = 0; i < MAX; i++){
		int posi = i;
		for(int j = 0; j < k; j++){
			posi = ch[posi];	
		}
		af[posi] = i;
	}
	for(int i = 0; i < MAX; i++){
		if(i != 0) printf(" ");
		printf("%c%d",Front(af[i]),af[i]%13 + 1);
	}
	return 0; 
}

A shuffling machine in C++ can be implemented using an array to represent the deck of cards and using the random number generator to shuffle the cards. Here is a sample code for a shuffling machine: ``` #include <iostream> #include <cstdlib> #include <ctime> using namespace std; const int NUM_CARDS = 52; class ShufflingMachine { private: int deck[NUM_CARDS]; int position; public: ShufflingMachine() { for (int i = 0; i < NUM_CARDS; i++) { deck[i] = i; } position = 0; } void shuffle() { srand(time(NULL)); for (int i = 0; i < NUM_CARDS; i++) { int j = rand() % NUM_CARDS; swap(deck[i], deck[j]); } position = 0; } int dealCard() { if (position >= NUM_CARDS) { shuffle(); } return deck[position++]; } }; int main() { ShufflingMachine shuffler; shuffler.shuffle(); for (int i = 0; i < NUM_CARDS; i++) { cout << shuffler.dealCard() << " "; } cout << endl; return 0; } ``` In this code, the `ShufflingMachine` class represents the shuffling machine. The `deck` array stores the deck of cards, and the `position` variable keeps track of the current position in the deck. The `shuffle` method shuffles the deck by randomly swapping cards. It uses the `srand` function to seed the random number generator with the current time, and the `rand` function to generate random indices for swapping cards. The `dealCard` method deals the next card from the deck. If the deck has been exhausted, it calls the `shuffle` method to shuffle the cards again. In the `main` function, we create a `ShufflingMachine` object and shuffle the cards. Then we deal all the cards and print them out.
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