Program showing use of Pointers and functions in C

#include 
int* do_balagan(int* a, int* b);

int main(void)
{
  int a,b;
  int* c;
  a=5;
  b=7;
  c = do_balagan(&a, &b);
  printf("In main:\n");
  printf("a=%d b=%d *c=%d\n", a, b, *c);
  return 0;
}

int* do_balagan(int* a, int* b)
{
  int* c;
  c = b;
  b = a;
  a = c;
  *a = *a + 5;
  *b = *a + *b;  
  printf("In balagan:\n");
  printf("*a=%d *b=%d *c=%d\n", *a, *b, *c);
  return c;
}