1 files changed, 27 insertions, 0 deletions
diff --git a/2/3_int_arith/check-211.c b/2/3_int_arith/check-211.c
new file mode 100644
index 0000000..174b0f4
--- /dev/null
+++ b/2/3_int_arith/check-211.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+
+void inplace_swap(int *x, int *y) {
+    *y = *x ^ *y;
+    *x = *x ^ *y;
+    *y = *x ^ *y;
+}
+
+void reverse_array(int a[], int cnt) {
+    int first, last;
+    for (first = 0, last = cnt-1;
+         first < last;
+         first++,last--)
+        inplace_swap(&a[first], &a[last]);
+}
+
+void print_array(int a[], int len) {
+    int i;
+    for (i = 0; i < len; i++)
+        printf("%d", a[i]);
+}
+
+void main() {
+    int a[] = {1,2,3,4,5, 6};
+    reverse_array(a, 6);
+    print_array(a, 6);
+}