Question

C Programming

1. For this task, you will have to write a program that will prompt the user for a number N. Then, you will have to prompt the user for N numbers, and print then print the sum of the numbers. For this task, you have to create and use a function with the following signature:
   int sum(int* arr, int n);

   1. Your code should look something like this (you can start with this as a template:
      int sum(int* arr, int n) {
      // your code for sum
      }
      
      int main() {
      int N;
      // some code to prompt for N
      int arr[N];
      // some code to prompt for N numbers
      int S = sum(arr, N);
      // print out S
      }

   2. Note that within sum, although arr is of the type int* (integer pointer), you can treat it as any other normal array

What the user should see in the console is something like this when the code is run (although formatting is up to you):
Number of numbers: 3
Input 1: 3
Input 2: 2
Input 3: 1
The sum of the numbers is: 6

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include<stdio.h>

//method to find sum of elements in an array

int sum(int* arr, int n) {

                //setting sum to 0

                int s=0;

                //looping and summing up all numbers

                for(int i=0;i<n;i++){

                                s+=arr[i];

                }

                //returning sum

                return s;

}

int main() {

                int N;

                //prompting and reading N

                printf("Number of numbers: ");

                scanf("%d",&N);

                //declaring array

                int arr[N];

                //reading N numbers and adding to array

                for(int i=0;i<N;i++){

                                printf("Input %d: ",(i+1));

                                scanf("%d",&arr[i]);

                }

                //finding and displaying sum

                int s=sum(arr,N);

                printf("The sum of numbers is: %d\n",s);

                return 0;

}

/*OUTPUT*/

Number of numbers: 5

Input 1: 1

Input 2: 2

Input 3: 5

Input 4: 7

Input 5: 10

The sum of numbers is: 25