Dynamic arrays homework

Zadacha 1:

#include <iostream>
#include <stdlib.h>
#include <time.h>
#include <cstdlib>

using namespace std;

int main(){

    srand(time(NULL));
    int random_integer;
    int lowest = (-12), highest = 122;
    int range = (highest - lowest) + 1;

    unsigned int rows, collums;

    cout << "Enter rows and collums and i will generate randum numbers for them" << endl;
    cin >> rows >> collums;

    int* *dynamicarr = new int*[rows];

    for (unsigned int i = 0; i < rows; i++) {
        dynamicarr[i] = new int[collums];
    }

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < collums; j++) {
            random_integer = lowest + int(range*rand() / (RAND_MAX + 1.0));
            dynamicarr[i][j] = random_integer;
        }
    }

    for (int i = 0; i < collums; i++) {
        cout << "|";
        for (int j = 0; j < collums; j++) {
            cout << "\t"<< dynamicarr[i][j];

        }
        cout << "|\n";
        }

    for (int i = 0; i <= collums; i++) {
        delete[] dynamicarr[i];
    }

    delete[] dynamicarr;
    dynamicarr = NULL;


    return 0;
}

Zadacha 2:

#include <iostream>
#include <stdlib.h>
#include <time.h>
#include <cstdlib>

using namespace std;

int main(){

    srand(time(NULL));
    int random_integer;
    int lowest = (-12), highest = 122;
    int range = (highest - lowest) + 1;

     int rows, collums;

    cout << "Enter rows and collums and i will generate randum numbers for them" << endl;
    cin >> rows >> collums;

    int n = 2;


    int* *dynamicarr = new int*[rows];

    for (unsigned int i = 0; i < rows; i++) {
        dynamicarr[i] = new int[collums];
    }

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < collums; j++) {
            random_integer = lowest + int(range*rand() / (RAND_MAX + 1.0));
            dynamicarr[i][j] = random_integer;
        }
    }


    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < collums; j++) {
            if (i == n - j )
            {
                dynamicarr[i][j] = 0;
            }

            if (i == n - j - 1)
            {
                dynamicarr[i][j] = 0;
            }

            if (i == n - j - 2)
            {
                dynamicarr[i][j] = 0;
            }
        }

    }


    for (int i = 0; i < collums; i++) {
        cout << "|";
        for (int j = 0; j < collums; j++) {
            cout << "\t"<< dynamicarr[i][j];

        }
        cout << "|\n";
        }

    for (int i = 0; i <= collums; i++) {
        delete[] dynamicarr[i];
    }




    delete[] dynamicarr;
    dynamicarr = NULL;


    return 0;
}

Zadacha 3:

#include <iostream>
#include <stdlib.h>
#include <time.h>
#include <cstdlib>

using namespace std;

int main(){

    srand(time(NULL));
    int random_integer;
    int lowest = (-12), highest = 122;
    int range = (highest - lowest) + 1;

     int rows, collums;

    cout << "Enter rows and collums and i will generate randum numbers for them" << endl;
    cin >> rows >> collums;

    int n = 2;


    double* *dynamicarr = new double*[rows];

    for (unsigned int i = 0; i < rows; i++) {
        dynamicarr[i] = new double [collums];
    }

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < collums; j++) {
            random_integer = lowest + int(range*rand() / (RAND_MAX + 1.0));
            dynamicarr[i][j] = random_integer;
        }
    }


    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < collums; j++) {
            if (i > j)
            {
                dynamicarr[i][j] = pow(dynamicarr[i][j],i);
            }

            if (j == n )
            {
                dynamicarr[i][j] = pow(dynamicarr[i][j], i);
            }


        }

    }


    for (int i = 0; i < collums; i++) {
        cout << "|";
        for (int j = 0; j < collums; j++) {
            cout << "\t"<< dynamicarr[i][j];

        }
        cout << "|\n";
        }

    for (int i = 0; i <= collums; i++) {
        delete[] dynamicarr[i];
    }

    delete[] dynamicarr;
    dynamicarr = NULL;


    return 0;
}

    Zadacha 4:


//raboti (na teoriq) samo za 4x4 sled kato vzemem funkcii moje i da uspeq da q napravq za nxn :)
#include <iostream>
#include <stdlib.h>
#include <time.h>
#include <cstdlib>

using namespace std;

int main() {

    srand(time(NULL));
    int random_integer;
    int lowest = (-12), highest = 122;
    int range = (highest - lowest) + 1;

    unsigned int rows, collums;

    cout << "Enter rows and collums and i will generate randum numbers for them" << endl;
    cin >> rows >> collums;

    int* *dynamicarr = new int*[rows];

    for (unsigned int i = 0; i < rows; i++) {
        dynamicarr[i] = new int[collums];
    }

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < collums; j++) {
            random_integer = lowest + int(range*rand() / (RAND_MAX + 1.0));
            dynamicarr[i][j] = random_integer;
        }
    }

    for (int i = 0; i < 1; i++) {
        for (int j = 0; j < collums; j++) {
            cout << "\t" << dynamicarr[i][j];
        }
    }

    for (int i = 0; i < rows; i++) {
        for (int j = collums; j < collums + 1; j++) {
            cout << "\t" << dynamicarr[i][j];
        }
    }

    for (int i = rows; i < rows + 1; i++) {
        for (int j = collums; j > 0; j--) {
            cout << "\t" << dynamicarr[i][j];
        }
    }

    for (int i = rows; i > 0; i--) {
        for (int j = 0; j < 1; j++) {
            cout << "\t" << dynamicarr[i][j];
        }
    }

    for (int i = 1; i < 2; i++) {
        for (int j = 1; j < collums - 1; j++) {
            cout << "\t" << dynamicarr[i][j];
        }
    }

    for (int i = 2; i < 3; i++) {
        for (int j = collums - 1; j > 0; j++) {
            cout << "\t" << dynamicarr[i][j];
        }
    }


    for (int i = 0; i <= collums; i++) {
        delete[] dynamicarr[i];
    }

    delete[] dynamicarr;
    dynamicarr = NULL;


    return 0;
}