/in/foo.cc: In function 'int main()':
/in/foo.cc:11:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if(a>=b)
     ^
/in/foo.cc:17:2: error: 'else' without a previous 'if'
  else 
  ^~~~
/in/foo.cc:19:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if(b>=a)
     ^
/in/foo.cc:25:2: error: 'else' without a previous 'if'
  else 
  ^~~~
/in/foo.cc:27:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
   if(c>=a)
     ^