8.2.13

#include <iostream>
#include <cmath>
#include <string.h>
#include<cstdlib>
#include<ctime>

using namespace std;

class MyArray{
    private:
    int* Arr;
    int length;
    int n;
    int m;

    public:
    MyArray(int n,int m)
    {
        length=n*m;
        Arr=new int[length];
        this->n=n;
        this->m=m;
        for(int i=0;i<length;i++)
        {
            Arr[i]=i;
        }
    }

    void ChangeElement(int x,int y,int a)
    {
        int id=x*m;
        id+=y;
        Arr[id]=a;
    }

    void Output(){
        cout<<endl;
        for(int i=0,j=0;i<length;i++,j++)
        {
            if (j==m) {cout<<endl;j=0;}
            cout.width(3);
            cout<<Arr[i]<<" ";

        }
    }

    void lineSum()
    {
        int Sum=0;
        int lineNumber=0;
        cout<<endl;
        for(int i=0,j=0;i<length;i++,j++)
        {
            Sum+=Arr[i];
            if(j==m-1) {
                cout<<"Summ in line "<<lineNumber<<" - "<<Sum<<endl;
                lineNumber++;
                Sum=0;
                j=-1;
            }
        }
        cout<<endl;
    }

    void columnSum()
    {
        cout<<endl;
        int *Sum=new int[m];
        for(int i=0;i<m;i++)
        {
            Sum[i]=0;
        }
        for(int i=0,j=0;i<length;i++,j++)
        {
            if (j==m) j=0;
            Sum[j]+=Arr[i];
        }
        for(int i=0;i<m;i++)
        {
            cout<<"Summ in column "<<i<<" - "<<Sum[i]<<endl;
        }
        cout<<endl;
    }

};;


int main()
{
    int n=3;
    int m=4;
    MyArray a(n,m);
    srand((unsigned)time(0));

    for (int i=0;i<n;i++)
        for (int j=0;j<m;j++)
           a.ChangeElement(i,j,rand()%10);

    a.ChangeElement(2,2,0);
    a.Output();
    a.lineSum();
    a.columnSum();
    return 0;
}