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Task 2 :

Create an application that uses two nested for loopsto loop through the 2D array defined above and print the values.

#include <iostream>
using namespace std;
int main()
{
    int row,col,a[2][2];
    cout<<"Enter elements :";
    for(row=0;row<2;row++)
    {
        for(col=0;col<2;col++)
        {
            cin>>a[row][col];
        }
    }
    
    for(row=0;row<2;row++)
    {
        for(col=0;col<2;col++)
        {
            cout<<a[row][col]<<" ";
        }
        cout<<endl;
    }
    
return 0;
}

Task 3 :

Write an application that creates a two-dimensional array of doubles, with two rows and three columns. Print the value in the second row and third column.

#include <iostream>
using namespace std;
int main()
{
    int row,col,a[2][3];
    cout<<"Enter elements :";
    for(row=0;row<2;row++)
    {
        for(col=0;col<3;col++)
        {
            cin>>a[row][col];
        }
    }
    
    cout<<"second row and thirder column :"<<a[1][2];
    return 0;
}

Task 4 :

#include <iostream>
using namespace std;
int main()
{
    int i,j,k,a[3][3],b[3][3],c[3][3],d[3][3];
    cout<<"Enter elements for 1st array:"<<endl;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            cin>>a[i][j];
        }
    }
    cout<<"Enter elements for 2nd array:"<<endl;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            cin>>b[i][j];
        }
    }
    cout<<"\\n\\nAddition :"<<endl;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            c[i][j]=a[i][j]+b[i][j];
            cout<<c[i][j]<<" ";
        }
        cout<<endl;
    }
    cout<<"\\n\\nSubtraction :"<<endl;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            d[i][j]=a[i][j]-b[i][j];
            cout<<d[i][j]<<" ";
        }
        cout<<endl;
    }
    
    cout<<"\\n\\nTranspose of 1st matrix :"<<endl;
    for(i=0;i<3;i++)
    {
        for(j=0;j<3;j++)
        {
            cout<<a[j][i]<<" ";
        }
        cout<<endl;
    }
    
    cout<<"\\n\\nMultiplication :"<<endl;
    for(i=0;i<3;i++)    
    {    
        for(j=0;j<3;j++)    
        {    
            d[i][j]=0;    
            for(k=0;k<3;k++)    
            {    
                d[i][j]+=a[i][k]*b[k][j];    
            }    
        }    
    }
    
    for(i=0;i<3;i++)    
    {    
        for(j=0;j<3;j++)    
        {    
            cout<<d[i][j]<<" ";    
        }    
        cout<<endl;    
    }    

}