Question

Write a program that (use C++) if u can use or <iostream> or <stdio.h> or both .

1. Creates a 5x4 array.
2. Creates a function that reverses all the rows and columns using loops and stores the result in a different array.
3. In the main function print both arrays.

Example: Input Array 100 101 102 103 110 111 112 113 120 121 122 123 130 131 132 133 140 141 142 143 Output Array 143 142 141 140 133 132 131 130 123 122 121 120 113 112 111 110 103 102 101 100

Answer 1

Answer:-

The code for the above program is given below, i have commented in line for the explanation.

Code:-

#include <iostream>

using namespace std;

void reverse(int arr[][4], int row, int col)
{
// array for storing new array
int arr2[row][col];
  
// for every row in arr1
for(int i=0;i<row;i++)
{
// for every column in a row arr1
for(int j=0;j<col;j++)
{
// this is where we reverse the array
arr2[row-1-i][col-1-j]=arr[i][j];
}
}
  
// print old array
cout<<"\nOld 2D array was: \n";
for(int i=0;i<5;i++)
{
for(int j=0;j<4;j++)
{
cout<<arr[i][j]<<" ";
}
cout<<endl;
}
  
// porint new array
cout<<"\nNew 2D array is: \n";
for(int i=0;i<5;i++)
{
for(int j=0;j<4;j++)
{
cout<<arr2[i][j]<<" ";
}
cout<<endl;
}
}

int main()
{
// array to store user input in a array
int arr[5][4];
cout<<"Enter the 2D array elements : \n";
for(int i=0;i<5;i++)
{
for(int j=0;j<4;j++)
{
cin>>arr[i][j];
}
}
  
// function call to reverse the array
reverse(arr,5,4);
return 0;
}

Output:-

Enter the 2D array elements : 100 101 102 103 110 111 112 113 120 121 122 123 130 131 132 133 140 141 142 143 old 2D array was: 100 101 102 103 110 111 112 113 120 121 122 123 130 131 132 133 140 141 142 143 New 2D array is: 143 142 141 140 133 132 131 130 123 122 121 120 113 112 111 110 103 102 101 100 ... Program finished with exit code 0 Press ENTER to exit console.

Hope it clears your doubt, do give a thums up if it helps you :)