add heapsort

Sorts/HeapSort.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+
+void heapify(int *unsorted, int index, int heap_size);
+void heap_sort(int *unsorted, int n);
+
+int main() {
+	int n = 0;
+	int i = 0;
+	char s[50];
+	char oper;
+
+	int* unsorted;
+	printf("Enter the size of the array you want\n");
+	scanf("%d", &n);
+	unsorted = (int*)malloc(sizeof(int) * n);
+	while (getchar() != '\n');
+	printf("Enter numbers separated by a comma:\n");
+	gets(s);
+
+	char *ptr = strtok(s, ",");
+	while (ptr != NULL && i < n) {
+		*(unsorted + i) = atoi(ptr);
+		i++;
+		ptr = strtok(NULL, ",");
+	}
+	heap_sort(unsorted, n);
+
+	printf("[");
+	printf("%d", *(unsorted));
+	for (int i = 1; i < n; i++) {
+		printf(", %d", *(unsorted + i));
+	}
+	printf("]");
+}
+
+void heapify(int *unsorted, int index, int heap_size) {
+	int temp;
+	int largest = index;
+	int left_index = 2 * index;
+	int right_index = 2 * index + 1;
+	if (left_index < heap_size && *(unsorted + left_index) > *(unsorted + largest)) {
+		largest = left_index;
+	}
+	if (right_index < heap_size && *(unsorted + right_index) > *(unsorted + largest)) {
+		largest = right_index;
+	}
+
+	if (largest != index) {
+		temp = *(unsorted + largest);
+		*(unsorted + largest) = *(unsorted + index);
+		*(unsorted + index) = temp;
+		heapify(unsorted, largest, heap_size);
+	}
+}
+
+void heap_sort(int *unsorted, int n) {
+	int temp;
+	for (int i = n / 2 - 1; i > -1; i--) {
+		heapify(unsorted, i, n);
+	}
+	for (int i = n - 1; i > 0; i--) {
+		temp = *(unsorted);
+		*(unsorted) = *(unsorted + i);
+		*(unsorted + i) = temp;
+		heapify(unsorted, 0, i);
+	}
+}