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all permutations with repetition C++

Crazy Caribou answered on June 8, 2021 Popularity 6/10 Helpfulness 3/10

answer all permutations with repetition C++

all permutations with repetition C++

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#include <string>
#include <iostream>


void print_str(const char*,std::string,const int, const int);

int main()

{

    int lenght = 2;

    char str[] = {'A', 'B', 'C', 'D'};



    int n = sizeof str;

    print_str(str, "", n, lenght);  //Note: this function works on all cases and not just the case above

    return 0;

}

// The main recursive method to print all possible strings of length "length"
    void print_str(const char str[],std::string prefix,const int n, const int lenght)

    {

        if (lenght == 1)

            {

                for (int j = 0; j < n; j++)

                std::cout << prefix + str[j] << std::endl;

            }//Base case: lenght = 1, print the string "lenght" times + the remaining letter

        else

            {


               // One by one add all characters from "str" and recursively call for "lenght" equals to "lenght"-1
                for (int i = 0; i < n; i++)

                // Next character of input added
                print_str(str, prefix + str[i], n, lenght - 1);
                // "lenght" is decreased, because we have added a new character

            }

    }

Popularity 6/10 Helpfulness 3/10 Language cpp

Source: stackoverflow.com

Tags: c++

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Contributed on Jun 08 2021

Crazy Caribou

0 Answers Avg Quality 2/10

all permutations with repetition C++

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