# C++ : Calculate Average of Numbers Using Arrays

Tutorial by:Manisha Dubey      Date: 2016-06-18 04:51:55

This program takes n number of element from user(where, n is specified by user), stores data in an array and calculates the average of those numbers.

## Source Code to Calculate Average of Numbers Using Arrays

#include <iostream>
using namespace std;
int main(){
int n, i;
float num[100], sum=0.0, average;
cout << "Enter the numbers of data: ";
cin >> n;
while (n>100 || n<=0)
{
cout << "Error! number should in range of (1 to 100)." << endl;
cout << "Enter the number again: ";
cin >> n;
}
for(i=0; i<n; ++i)
{
cout << i+1 << ". Enter number: ";
cin >> num[i];
sum+=num[i];
}
average=sum/n;
cout << "Average = " << average;
return 0;
}

Output

Enter the numbers of data: 6
1. Enter number: 45.3
2. Enter number: 67.5
3. Enter number: -45.6
4. Enter number: 20.34
5. Enter number: 33
6. Enter number: 45.6
Average = 27.69

This program calculates the average if the number of data are from 1 to 100. If user enters value of n above 100 or below 100 then, while loop is executed which asks user to enter value of n until it is between 1 and 100.

## C++

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