1DArraysInC.c

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

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