/in/foo.c: In function 'main':
/in/foo.c:15:3: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(s[i]='W') a++;
   ^~
/in/foo.c:16:3: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(s[i]='L') b++;
   ^~
/in/foo.c:17:3: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(s[i]='\n') continue;
   ^~
/in/foo.c:18:6: warning: implicit declaration of function 'abs' [-Wimplicit-function-declaration]
   if(abs(a-b)>=2){
      ^~~