Question

Please code using C++ Thank you

Write a function that receives a 2d array of type double and returns the average of all elements in the 2d array

Answer 1

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
//Creating an 3 by 3 array
double arr[3][3];

//Declaring variables
double sum=0.0,average=0.0;
int count=0;

/* This for loop will get the numbers entered
* by the user and populates them into an array
*/
for(int i=0;i<3;i++)
{
   for(int j=0;j<3;j++)
   {
       //Getting the number entered by the user
   cout<<"Enter Number "<<i<<","<<j<<":";
   cin>>arr[i][j];  
   }
}

/* This for loop will calculates
* the sum of all the elements in the array
*/
for(int i=0;i<3;i++)
{
   for(int j=0;j<3;j++)
   {
   //Sum of all the elements
   sum+=arr[i][j];  
   count++;
   }
}      

//Calculates the average
average=sum/count;

//Dispalying the average
cout<<"The Average of all the elements is :"<<std::fixed<<std::setprecision(2)<<average<<endl;

   return 0;
}

_______________________

output:

C:AProgram Files (x86)\Dev-CpplMinGW64 binlAverageOf2DArray.exe Enter Number ,011.1 Enter Number 0.1:22.2 Enter Number .2:33.3 Enter Number 1,0:44.4 Enter Number 1.1:55.5 Enter Number 1.2:66.6 Enter Number 2,0:77. Enter Number 2.1:88.8 Enter Number 2.2:99 The Average of all the elements is :55.50 Process exited after 16.56 seconds with return value 0 Press any key to continue . . -

________Thank You