/*
  On base of test01
  target:
      undefined symble
      visit global variable
      if statement
      variable declaration in Compound statement 
      function declaration in compound statement
      error: line 27
*/
int x;
void main()
{
	int y;
	x = 1;
	y = 2+x;	
	z = y;					
	if (y == 2){
	   int z;
	   z = y;	
	}
	else if (y == 2){
	   int z;
	   z = x;	
	}
	if (y == 2){
	   void f(int a,int b){
	    	a = b =3;
	    }	
	}
}