运行 ID: 430984

Main.cc: In function ‘int main()’:
Main.cc:12:15: error: ‘ma’ was not declared in this scope
   if(a.size()>ma && a.find("a")!=-1)
               ^~
Main.cc:12:15: note: suggested alternative: ‘a’
   if(a.size()>ma && a.find("a")!=-1)
               ^~
               a
Main.cc:12:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(a.size()>ma && a.find("a")!=-1)
                     ~~~~~~~~~~~^~~~
Main.cc:15:6: error: ‘s’ was not declared in this scope
    b=s
      ^