So my code requires me to use exception handling. I wrote it out, but for some r

Question

So my code requires me to use exception handling. I wrote it out, but for some reason it keeps giving me the error member reference base type 'char' is not a structure or union. Could anybody help me debug the following section of my code?

char get_user_command( )

// Library facilities used: iostream

{

char response;

cout << "Enter choice: ";

cin >> response; // Input of characters skips blanks and newline character

if(response != 'C' && response != 'P' && response != 'S' &&

   response != 'A' && response != 'R' && response != 'Q')

{

bool isNum = true;

for(int k = response; k != response; ++k)

isNum &&= isdigit(*k);

if(!isNum)

throw "User has entered an Invalid Option";

else throw "User entered a number";

}

   return command;

}

Explanation / Answer

There are numerous mistakes in the program. It would have been better had you posted the entire code.

Mistakes::

1) k is not a pointer then why did you do *k ?

2) for(int k = response; k != response; ++k)

isNum &&= isdigit(*k);

doesnt make any sense. If k is a pointer then it should be a char pointer because it is pointing at response which is char . Further more what are you trying to achieve by the condition k!=response, it doesnt make any sense

3) what is the data type of "command"?

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