/******************************************************************************


*******************************************************************************/
#include <iostream>
#include <cstdlib>

using namespace std;


int main()
{
    float a;
    float b;
    float c;
    float d;
    float res1;
    float res2;
    float res3;
    int operator1;
    int operator2;
    int operator3;
    char str1;
    char str2;
    char str3;
    char str4;
    int counter;
    int startValue;
    int endValue;
    srand(1);
    int puzzleChosen = 1 + (rand() % 3185);
    char userOperator1;
    char userOperator2;
    char userOperator3;

    cout << "Enter the beginning solution to be printed:";
    cin >> startValue;
    cout << endl;
    cout << "Enter the end soluition to be printed: ";
    cin >> endValue;
    cout << endl;

    for(a = 1; a <= 9; ++a){
        for(b = 1; b <= 9; ++b){
            for(c = 1; c <= 9; ++c){
                for(d = 1; d <= 9; ++d){
                    for( operator1 = 1; operator1 <= 4; ++operator1 ){
                        for(operator2 = 1; operator2 <= 4; ++operator2){
                            for(operator3 = 1; operator3 <= 4; ++operator3){
                                if (operator1 == 1){
                                    str1 = '+';
                                    res1 = a + b;
                                }
                                else if(operator1 == 2){
                                    str1 = '-';
                                    res1 = a - b;
                                }
                                else if(operator1 == 3){
                                    str1 = '/';
                                    res1 = a / b;
                                }
                                else if(operator1 == 4){
                                    str1 = '*';
                                    res1 = a * b;
                                }

                                if(operator2 == 1){
                                    str2 = '+';
                                    res2 = res1 + c;
                                }
                                else if (operator2 == 2){
                                    str2 = '-';
                                    res2 = res1 - c;
                                }
                                else if (operator2 == 3){
                                    str2 = '/';
                                    res2 = res1 / c;
                                }
                                else if (operator2 == 4){
                                    str2 = '*';
                                    res2 = res1 * c;
                                }
                                if (operator3 == 1){
                                    str1 = '+';
                                    res3 = res2 + d;
                                }
                                else if(operator3 == 2){
                                    str3 = '-';
                                    res3 = res2 - d;
                                }
                                else if(operator3 == 3){
                                    str3 = '/';
                                    res3 = res2 / d;
                                }
                                else if(operator3 == 4){
                                    str3 = '*';
                                    res3 = res2 * d;
                                }
                                if (res3 == 24){
                                    ++counter;
                                    if (counter >= startValue && counter <= endValue){
                                        cout << counter << ":" << a << " " << str1 << " " << b << " " << str2 << " " << c << " " << str3 << " " << d;
                                        cout << " = " << res3;
                                        cout << endl;
                                    }
                                    if (counter == puzzleChosen){
                                     cout << "Puzzle chosen is #" << counter << ":" << a << " " << str1 << " " << b << " " << str2 << " " << c << " " << str3 << " " << d;
                                     cout << endl;
                                     cout << "The numbers to use are " << a << " " << b << " " << c << " " << d;
                                     cout << endl;
                                     cout << "Enter the three operators to be used (+, -, * or / ):" << endl;
                                     cin >> userOperator1;
                                     cin >> userOperator2;
                                     cin >> userOperator3;
                                     cout << endl;
                                     if (str1 == userOperator1 && str2 == userOperator2 && str3 == userOperator3){
                                        cout << a << str1 << b << " = " << res1 << endl;
                                        cout << res1 << str2 << c << " = " << res2 << endl;
                                        cout << res2 << str3 << d << " = " << res3 << endl;
                                        cout << "Well done!" << endl;
                                     }
                                    }
                                }
                            }
                        }
                    }
                }

            }
        }
        return 0;
}
}