Question

Complere a c++ function that returns the sum of all elements in a two-dimensional array of double's:

const int COLUMNS = 5;
double sum(double values[][COLUMNS], int rows) {

Answer 1

code:

#include<bits/stdc++.h>
using namespace std;
const int COLUMNS = 5; //declaring global variable.
double sum(double values[][COLUMNS], int rows) //function to find the sum of all values in array.
{
double total=0; //declaring variable to sum the all values.
for(int i=0; i<rows; i++) //to read each row.
{
for(int j=0; j<COLUMNS; j++) //to read each columns.
{
total += values[i][j]; //adding each element to total.
}
}
return total; //return sum of all elements to main function.
}
int main()
{
int rows;
cout << "Enter number of rows: "; //prompting to number of rows.
cin >> rows; //reading number of rows.
double values[rows][COLUMNS]; //declaring array.

cout << "Enter values of array: " << endl; //prompting to enter array values.
for(int i=0; i<rows; i++)
{
for(int j=0; j<COLUMNS; j++)
{
cin >> values[i][j]; //reading the array values.
}
}

double Total = sum(values, rows); //calling the function to get the sum of all elements in array.
cout << "Sum of all elements in a two dimensional array: " << Total << endl; //printing the sum of array.

return 0;
}

image of code:

#include<bits/stdc++.h> using namespace std; const int COLUMNS = 5; // declaring global variable. double sum (double values[] [COLUMNS], int rows) //function to find the sum of all values in array. Eco van. UN double total=0; // declaring variable to sum the all values. for(int i=0; i<rows; i++) //to read each row. for(int j=0; j<COLUMNS; j++) //to read each columns. total += values[i][j]; //adding each element to total. return total; //return sum of all elements to main function.

int main() int rows; cout << "Enter number of rows: "; //prompting to number of rows. cin >> rows; //reading number of rows. double values [rows] [COLUMNS]; //declaring array. cout << "Enter values of array: " << endl; //prompting to enter array values. for(int i=0; i<rows; i++) for(int j=0; j<COLUMNS; j++) cin >> values[i][j]; //reading the array values. double Total = sum (values, rows); // calling the function to get the sum of all elements in array. cout << "Sum of all elements in a two dimensional array: " « Total < endl; //printing the sum of array. return 0;

output:

Enter number of rows: 2 Enter values of array: 1 2 3 4 5 5 4 3 2 1 Sum of all elements in a two dimensional array: 30 Process returned @ (@xe) execution time : 20.319 s Press any key to continue.

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