Run id: 124713

Main.cc: In function 'int main()':
Main.cc:6:7: error: 'a' was not declared in this scope
  cin>>a;
       ^
Main.cc:21:3: error: 'else' without a previous 'if'
  }else{
   ^
Main.cc:25:3: error: 'else' without a previous 'if'
  }else{
   ^
Main.cc:5:6: warning: unused variable 'b' [-Wunused-variable]
  int b;
      ^