C++ Exercises: Compute the sum of the elements of a given array of integers

Last update on August 13 2025 12:46:59 (UTC/GMT +8 hours)

Sum of Array Elements

Write a C++ program to compute the sum of the elements of an array of integers.

Sample Solution:

C++ Code :

#include <iostream> // Including the input/output stream library
using namespace std; // Using the standard namespace

// Function that calculates the sum of elements in an integer array
int test(int a1[])
{
    // Return the sum of the elements at indices 0 to 4 in array a1
    return a1[0] + a1[1] + a1[2] + a1[3] + a1[4];
}

// Main function
int main() 
{
    int nums[] = {10, 20, 30, 40, 50}; // Define an array nums with 5 integer elements
    cout << test(nums) << endl; // Output the result of test function for nums

    int nums1[] = {10, 20, -30, -40, 50}; // Define an array nums1 with 5 integer elements (some negative)
    cout << test(nums1) << endl; // Output the result of test function for nums1

    return 0; // Return statement indicating successful termination of the program
}

Sample Output:

150
10

Visual Presentation:

C++ Basic Algorithm Exercises: Compute the sum of the elements of a given array of integers.

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program to compute the sum of all elements in an integer array and print the result.
Write a C++ program that reads an array of integers and outputs the total sum using a loop construct.
Write a C++ program to calculate the aggregate of numbers in an array and display the result with a formatted message.
Write a C++ program that sums the elements of an input array and prints the final sum, ensuring it handles negative numbers correctly.

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