Question

How to create permutation of 4 letters based on vector in C++

Answer 1

#include <iostream>
#include <vector>
#include <algorithm>

using std::cout;
using std::endl;
using std::vector;

int main()
{
	vector<char> vec;

	for (int i = 0; i < 4; i++)
		vec.push_back('a' + i);

	do {
		for (int i = 0; i < vec.size(); i++)
			cout << vec[i];
		cout << endl;
	} while (next_permutation(vec.begin(), vec.end()));

	cout << endl;

	return 0;
}


/*
run:

abcd
abdc
acbd
acdb
adbc
adcb
bacd
badc
bcad
bcda
bdac
bdca
cabd
cadb
cbad
cbda
cdab
cdba
dabc
dacb
dbac
dbca
dcab
dcba

*/

 

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