/in/foo.cc: In function 'int main()':
/in/foo.cc:10:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  while (cha=rec[j]){
                  ^
/in/foo.cc:12:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (cha='W') PointHua++;
              ^
/in/foo.cc:13:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (cha='L') PointDui++;
              ^
/in/foo.cc:14:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (cha='E') break;
              ^
/in/foo.cc:24:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  while (cha=rec[k]){
                  ^
/in/foo.cc:26:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (cha='W') PointHua++;
              ^
/in/foo.cc:27:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (cha='L') PointDui++;
              ^
/in/foo.cc:28:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if (cha='E') break;
              ^