diff --git a/cpp/_rvmain.cpp b/cpp/_rvmain.cpp
index ac953e8..b5c3490 100644
--- a/cpp/_rvmain.cpp
+++ b/cpp/_rvmain.cpp
@@ -37,36 +37,32 @@ char *alloc(int n)
      return 0;
 }
 
+int32_t sum (int32_t a, int32_t b) {
+
+    return a+b;
+}
+
 int main()  {
 
-    char * s = "mpabi";
- 
- 
-   uint8_t wynik =0;
-    wynik = strlen (s);
-
-        asm("nop");
-
-
-        char *  p1 = alloc(strlen(ptr1)); 
-        strcpy (p1, ptr1);
-        asm("nop");
-
-        char *  p2 = alloc(strlen(ptr2)); 
-        strcpy (p2, ptr2);
-        asm("nop");
 
         struct point {
-            int16_t x;
-            int16_t y;
+            int32_t x;
+            int32_t y;
         };
 
-        struct point *  ptrS = (struct point *) alloc(sizeof(point)); 
-        ptrS->x=0x10;
-        ptrS->y=0x20;
+        struct point *  ptrS;
+        
+        ptrS = (struct point *) alloc(sizeof(point));
+
         asm("nop");
 
-        (*ptrS).y= strlen (p1)+ strlen(p2);
+        ptrS->x=0x10;
+        ptrS->y=0x20;
+
+        int32_t wynik = 0;
+
+        wynik = sum ( (*ptrS).x,  ptrS->y);
+        asm("nop");
 
     return 1;
 }