/in/foo.cc: In function 'int judgea()':
/in/foo.cc:23:44: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(f[0][0]='.'&&f[0][1]=='0'&&f[0][2]=='0')print(4);
                                            ^
/in/foo.cc:24:44: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(f[0][0]='0'&&f[0][1]=='0'&&f[0][2]=='.')print(4);
                                            ^
/in/foo.cc:25:44: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(f[0][0]='0'&&f[0][1]=='.'&&f[0][2]=='.')print(4);
                                            ^
/in/foo.cc:26:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^