Help how check uppercase ?

[benguerenler]

I have a homework that, the user input should be only lowercase. If the word has a uppercase i should give a error message and ask again in a loop.

We only learnt strings and loops. My teacher wants that only using with find() function and in a loop.
I can not use char [] or others.

Can you help me?

 string a = "A";
	 for (unsigned int s =0 ; s <name1.length(); s++)
	 {
		 if ( name1.find("A") == string ::npos)
		 {
		cout<<"ok";
		 
		
		 }
		 else 
		 {
			  cout <<"The input is invalid! "<<endl;
		 cout <<"Enter a new input1" ;
		 cin>>name1;
		 }

I did something like that. I know that wrong i have to check input all A-Z.

Thanks!

[jlb]

You may want to think about using find_first_of().