Homework 5

#include<iostream>
using namespace std;
int main()
{
    cout<<"Write a program in C++ to execute the following\n";
    cout<<"1 : Insert items to the array (Whitout using cin)\n";
    int i,j,k=9,a[4][4];
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            a[i][j]=k;
            cout<<a[i][j]<<"\t";
        }
        cout<<endl<<endl;
        k-=3;
    }
    cout<<"--------------------------------------------------------\n";
    cout<<"2 : find odd numbers in the array , putting it to the 1D array and print it.\n";
    int b[7],t=0;
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            if(a[i][j]%2==1)
            {
                b[t]=a[i][j];
                t++;
            }
        }
    }
    for(i=0;i<t;i++)
    {
        cout<<b[i]<<"\t";
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"3 : find even numbers in the array , putting it to the 1D array and print it.\n";
    int p=0,c[7];
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            if(a[i][j]%2==0)
            {
                c[p]=a[i][j];
                p++;
            }
        }
    }
    for(i=0;i<p;i++)
    {
        cout<<c[i]<<"\t";
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"4 : Divided the array SE(4,4) to two array x(2,4) , y(2,4)\n";
    cout<<"X (2 , 4 )\n";
    for(i=0;i<=1;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[i][j]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"Y (2 , 4 )\n";
    for(i=2;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[i][j]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"5 : swap first column with third column \n";
    int y;
    for(i=0;i<=3;i++)
    {
        y=a[i][0];
        a[i][0]=a[i][2];
        a[i][2]=y;
    }
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[i][j]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"6 : swap first row with third column \n";
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            y=a[0][j];
            a[0][j]=a[i][2];
            a[i][2]=y;
        }
    }
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[i][j]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"7 : swap second column with fourth row \n";
    int temp;
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            temp=a[i][1];
            a[i][1]=a[3][j];
            a[3][j]=temp;
        }
    }
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[i][j]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"8 : find the minimum and maximum number in the array and print them \n";
    int max=0,mini=0;
    max=a[0][0];
    mini=a[i][j];
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            if(a[i][j]>max)
                max=a[i][j];
            else if(a[i][j]<mini)
                mini=a[i][j];
        }
    }
    cout<<"max : "<<max<<endl;
    cout<<"mini : "<<mini<<endl;
    cout<<"\n--------------------------------------------------------\n";
    cout<<"9 : inverse the array\n ";
    k=9;
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            a[i][j]=k;
        }
        k-=3;
    }
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[j][i]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"10 : arrange number in the first row in ascending \n ";
    for(j=0;j<=3;j++)
    {
        if(a[0][j]>a[0][j+1])
        {
            temp=a[0][j];
            a[0][j]=a[0][j+1];
            a[0][j+1]=temp;
        }

    }
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            cout<<a[j][i]<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"11 : print the upper triangle \n";
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            if(i+j<3||i+j==3)
            {
                cout<<a[j][i];
            }
            cout<<"\t";
        }
        cout<<endl<<endl;
    }
    cout<<"\n--------------------------------------------------------\n";
    cout<<"12 : print sum of number in lower triangle \n";
    int sum=0;
    for(i=0;i<=3;i++)
    {
        for(j=0;j<=3;j++)
        {
            if(i+j>3||i+j==3)
                sum+=a[j][i];
        }
    }
    cout<<"Sum : "<<sum<<endl;
}