1d-arrays-in-c.c

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main() {
    int n;
    int sum = 0;
    int *arr;
    
    scanf("%d", &n);
    arr = (int*) malloc(n * sizeof(int));
    
    for (int i = 0; i < n; i++)
        scanf("%d", &arr[i]);
    
    for (int i = 0; i < n; i++)
        sum += arr[i];
    
    printf("%d\n", sum);

    free(arr);
    return 0;
}