Sum of Array C++ Example Program in C++

About this program

This is an example program in c array example programs. Read the concept first: Understanding Array in C++, then study the code and output below.

Definition

Calculate sum for all the array elements.

Sum of Array Example Program

/*##Sum of Array In C++*/
/*##Calculation Programs In C++, Array Example Programs In C++*/

// Header Files
#include <iostream>
#include<conio.h>

using namespace std;

#define ARRAY_SIZE 5

int main()
{
    int array[ARRAY_SIZE];
    int i;
    float total = 0.0, average;
 
	cout<<"Sum of Array In C++ Example Program\n";
    
    for (i = 0; i < ARRAY_SIZE; i++)
    {
		cout<<"Enter the Number : "<< (i+1) <<"  : ";
        cin>>array[i];
    }
    
    /*  Sum of the Array Using for Loop */
    for (i = 0; i < ARRAY_SIZE; i++)
    {
        total = total + array[i] ;
    }
    average = total / ARRAY_SIZE;
    
    cout<<"\n Sum of all Numbers =  "<< total<<"\n";
    cout<<"\n Average of all input numbers =  "<< average<<"\n";
    
    getch();
}

Sample Output

Enter the Number : 1  : 6
Enter the Number : 2  : 7
Enter the Number : 3  : 8
Enter the Number : 4  : 2
Enter the Number : 5  : 3

Sum of all Numbers =  26.000000

Average of all input numbers =  5.20

How It Works

This C++ program demonstrates Sum of Array. It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Learn the concept first, then study the code:

• C++ Programs — Browse all C++ Programs.
• Understanding Array in C++ — Tutorial — arrays, indexing and multidimensional arrays.
• Single Dimensional Array Example Program in C++ Programming — More in c array example programs.
• Read Array and Print Array C++ Example Program — More in c array example programs.