Justification

K&R declaration style is not supported in C++. So programs will not be portable from C to C++ if they use this style of declaration.

Example

int foo(a, p) /* WRONG, K&R style */
  int a;
  char* p;
{
  return 0;
}

int foo(int a, char* p) /* RIGHT, ANSI style */
{
  return 0;
}