Question

How to print lexicographic permutations of 0, 1 and 2 as strings in C++

Answer 1

#include <iostream>

int main(void) {
    char arr[4] = "";
     
    for (int i = 0; i < 3; i++) {  
        for (int j = 0; j < 3; j++) {  
            for (int k = 0; k < 3; k++) {  
                if (i != j && i != k && j != k)  {
                    arr[0] = i + '0';
                    arr[1] = j + '0';
                    arr[2] = k + '0';
                    std::cout << arr << "\n";
                }
            }  
        }  
    }  
}
   
   
   
     
/*
run:
     
012
021
102
120
201
210
   
*/

 

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