/in/foo.cc: In function 'int main()':
/in/foo.cc:16:10: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(T[i]='u')time+=t1+t3;
      ~~~~^~~~
/in/foo.cc:17:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  else if(T[i]='f')time+=2*t2;
          ~~~~^~~~
/in/foo.cc:18:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  else if(T[i]='d')time+=t1+t3;
          ~~~~^~~~