The main
function is the starting point of the program. An integer variable quantity
and an integer variable i
are declared. An array of floating-point numbers numbers
with 20 elements and a floating-point variable result
are also declared.
The next part of the code outputs a prompt to the user asking for the number of elements to store in the numbers
array and stores the user’s input in the quantity
variable.
The first for loop iterates quantity
times and stores the user’s input in each element of the numbers
array.
This second for loop iterates over the numbers
array and adds up the elements in the array. The average of the array is then calculated by dividing the sum of the elements by the number of elements.
Finally, the average of the elements in the numbers
array is output to the user and the program returns 0, indicating a successful completion.
#include <iostream>
using namespace std;
int main () {
int quantity, i;
float numbers[20], result;
cout << "How many numbers do you want to store in array? (1 - 20) " << endl;
cin >> quantity;
// Store numbers in array (user input)
for(i = 0 ; i < quantity ; i++) {
cout << "Please enter a number: " << endl;
cin >> numbers[i];
}
// Loop over array and sum up the array entries
for(int i = 0; i < quantity; i++) {
result += numbers[i];
}
result = result / quantity;
cout << "Average of array is: " << result << endl;
return 0;
}
How many numbers do you want to store in array? (1 - 20)
5
Please enter a number:
54
Please enter a number:
22
Please enter a number:
89
Please enter a number:
33
Please enter a number:
12
Average of array is: 42