upgrade

SelfEducation/Task/T4/center/func.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+void center(int xlt, int ylt, int xrb, int yrb, int *pxc, int *pyc)
+{
+    *pxc = (xlt + xrb) / 2;
+    *pyc = (ylt + yrb) / 2;
+}
+
+void rotateC(int *x1, int *y1, int *x2, int *y2)
+{
+    int t1 = *x1, t2 = *x2;
+
+    *x1 = *y2;
+    *x2 = *y1;
+    *y1 = t2;
+    *y2 = t1;
+}