Add selection sort

selection-sort.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+
+#define SWAP(x, y, T) do { T SWAP = x; x = y; y = SWAP; } while (0)
+
+int index_of_min(int array[], int low, int high) {
+	int result = low;
+	for (int i = low; i <= high; i++) {
+		if (array[i] < array[result])
+			result = i;
+	}
+	return result;
+}
+
+void selection_sort(int array[], int high) {
+	for (int i = 0; i <= high; i++) {
+		int min = index_of_min(array, i, high);
+		SWAP(array[i], array[min], int);
+	}
+}
+
+void print_array(int array[], int high) {
+	for (int i = 0; i <= high; i++)
+		printf("%d ", array[i]);
+	printf("\n");
+}
+
+void main() {
+	int array[] = {1, 3, 6, 2, 4, 73, 23, 61, 32, 64, 11, 32, 3, 2};
+	selection_sort(array, 13);
+	print_array(array, 13);
+}