Question

Written in C++ (On CodeStepbyStep)

Write a function named mean that accepts as a parameter a reference to a Vector of real numbers, and returns the arithmetic mean (average) of the integers in the vector as a real number. For example, if the vector passed contains {2.0, 4.5, 6.5, 1.0}, your function should return 3.5. If the vector is empty, return 0.0. Do not modify the vector that is passed in.

Answer 1

Solution:

code:

// C++ program to illustrate the
// iterators in vector
#include <iostream>
#include <vector>

using namespace std;

double average(vector<double> vect) //method to find the mean
{
   if(vect.empty())
   return 0.0;
   else{
double sum= 0, average= 0;
for (int i=0; i<vect.size(); i++)
{
sum+= vect[i];
}
average= sum/vect.size();

   return average; //returnting the average value after the calculation
   }
}

int main()
{
   vector<double> vect;
   vect.push_back(2.0); //pushing the elements in the vector
   vect.push_back(4.5);
   vect.push_back(6.5);
   vect.push_back(1.0);
   double mean= average(vect); //calling the avg function
  

cout<<mean; //displaying the output

   return 0;
}

Output:

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