Question

C++ ASSIGNMENT: Two-dimensional array

Problem

Write a program that create a two-dimensional array initialized with test data. The program should have the following functions:

• getTotal - This function should accept two-dimensional array as its argument and return the total of all the values in the array.
• getAverage - This function should accept a two-dimensional array as its argument and return the average of values in the array.
• getRowTotal - This function should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The function should return the total of the values in the specified row.
• getColumnTotal - This function should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a column in the array. The function should return the total of the values in the specified column.
• getHighestInRow - This function should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The function should return the highest value in the specified row in the array.
• getLowestInRow - This function should accept a two-dimensional array as its first argument and an integer as its second argument. The second argument should be the subscript of a row in the array. The function should return the lowest value in the specified row in the array.

Use the main method below to test the program.

int main()
{
// Array with test data
int testArray[ROWS][COLS] =
{ { 1, 2, 3, 4, 5 },
{ 6, 7, 8, 9, 10 },
{ 11, 12, 13, 14, 15 },
{ 16, 17, 18, 19, 20 }
};

// Display the total of the array elements.
cout << "The total of the array elements is "
<< getTotal(testArray, ROWS, COLS)
<< endl;

// Display the average of the array elements.
cout << "The average value of an element is "
<< getAverage(testArray, ROWS, COLS)
<< endl;

// Display the total of row 0.
cout << "The total of row 0 is "
<< getRowTotal(testArray, 0, COLS)
<< endl;

// Display the total of column 2.
cout << "The total of col 2 is "
<< getColumnTotal(testArray, 2, ROWS)
<< endl;

// Display the highest value in row 2.
cout << "The highest value in row 2 is "
<< getHighestInRow(testArray, 2, COLS)
<< endl;

// Display the lowest value in row 2.
cout << "The lowest value in row 2 is "
<< getLowestInRow(testArray, 2, COLS)
<< endl;

return 0;
}

Output sample

The total of the array elements is 210
The average value of an element is 10.5
The total of row 0 is 15
The total of col 2 is 42
The highest value in row 2 is 15
The lowest value in row 2 is 11

Answer 1

Solution:

#include<iostream>
using namespace std;
#define ROWS 4
#define COLS 5

int getTotal(int testArray[4][5], int r, int c)
{
   int i,j,sum=0;
  
   for(i=0;i<r;i++)
       for(j=0;j<c;j++)
           sum=sum+testArray[i][j];
  
   return sum;  
}
float getAverage(int testArray[4][5], int r, int c)
{
   int i,j,sum=0;
   float avg;
  
   for(i=0;i<r;i++)
       for(j=0;j<c;j++)
           sum=sum+testArray[i][j];
  
   avg=(float)sum/(float)(r*c);
   return avg;
}
int getRowTotal(int testArray[4][5], int row, int c)
{
   int sum=0,i;

   for(i=0;i<c;i++)
       sum=sum+testArray[row][i];
  
   return sum;
}
int getColumnTotal(int testArray[4][5], int col, int r)
{
   int sum=0,i;
  
   for(i=0;i<r;i++)
       sum=sum+testArray[i][col];

   return sum;
}
int getHighestInRow(int testArray[4][5], int row, int c)
{
   int max=testArray[row][0],i;

   for(i=0;i<c;i++)
       if(testArray[row][i]>max)
           max=testArray[row][i];

   return max;
  

}
int getLowestInRow(int testArray[4][5], int row, int c)
{

   int min=testArray[row][0],i;

   for(i=0;i<c;i++)
       if(testArray[row][i]<min)
           min=testArray[row][i];

   return min;
}

int main()
{
// Array with test data
int testArray[ROWS][COLS] =
{ { 1, 2, 3, 4, 5 },
{ 6, 7, 8, 9, 10 },
{ 11, 12, 13, 14, 15 },
{ 16, 17, 18, 19, 20 }
};

// Display the total of the array elements.
cout << "The total of the array elements is "<< getTotal(testArray, ROWS, COLS)<< endl;

// Display the average of the array elements.
cout << "The average value of an element is "<< getAverage(testArray, ROWS, COLS)<< endl;

// Display the total of row 0.
cout << "The total of row 0 is "<< getRowTotal(testArray, 0, COLS)<< endl;

// Display the total of column 2.
cout << "The total of col 2 is "<< getColumnTotal(testArray, 2, ROWS)<< endl;

// Display the highest value in row 2.
cout << "The highest value in row 2 is "<< getHighestInRow(testArray, 2, COLS)<< endl;

// Display the lowest value in row 2.
cout << "The lowest value in row 2 is "<< getLowestInRow(testArray, 2, COLS)<< endl;

return 0;
}

Output: