Week 4 Task 1: dynamic array with malloc (sum + avg + free)

src/week4_1_dynamic_array.c

@@ -1,7 +1,7 @@
 /*
  * week4_1_dynamic_array.c
- * Author: [Your Name]
- * Student ID: [Your ID]
+ * Author: [Mina Senturk]
+ * Student ID: [231ADB258]
  * Description:
  *   Demonstrates creation and usage of a dynamic array using malloc.
  *   Students should allocate memory for an integer array, fill it with data,
@@ -12,27 +12,43 @@
 #include <stdlib.h>
 
 int main(void) {
-    int n;
-    int *arr = NULL;
-
-    printf("Enter number of elements: ");
-    if (scanf("%d", &n) != 1 || n <= 0) {
-        printf("Invalid size.\n");
-        return 1;
-    }
-
-    // TODO: Allocate memory for n integers using malloc
-    // Example: arr = malloc(n * sizeof(int));
-
-    // TODO: Check allocation success
-
-    // TODO: Read n integers from user input and store in array
-
-    // TODO: Compute sum and average
-
-    // TODO: Print the results
-
-    // TODO: Free allocated memory
-
-    return 0;
+  int n;
+  int *arr = NULL;
+
+  printf("Enter number of elements: ");
+  if (scanf("%d", &n) != 1 || n <= 0) {
+    printf("Invalid size.\n");
+    return 1;
+  }
+
+  // TODO: Allocate memory for n integers using malloc
+  // Example: arr = malloc(n * sizeof(int));
+  arr = malloc(n * sizeof(int));
+  if (arr == NULL) {
+    printf("Memory allocation failed.\n");
+    return 1;
+  }
+
+  // TODO: Read n integers from user input and store in array
+  printf("Enter %d integers: ", n);
+  for (int i = 0; i < n; i++) {
+    scanf("%d", &arr[i]);
+  }
+
+  // TODO: Compute sum and average
+  int sum = 0;
+  for (int i = 0; i < n; i++) {
+    sum += arr[i];
+  }
+
+  double average = (double)sum / n;
+
+  // TODO: Print the results
+  printf("Sum = %d\n", sum);
+  printf("Average = %.2f\n", average);
+
+  // TODO: Free allocated memory
+  free(arr);
+
+  return 0;
 }