Re: return string
Eric Kaplan wrote:
I have a function like this
bool Table::Get(char* FieldName, char* FieldValue)
and I call the function like the follow
above I passed in a char pointer (char*) - FieldValue and use it just
like a return value.
but it seem not efficient as each time i initialize a char array of
but some string (FieldValue) is only like  char.
how to I do better for returning string? any example code?
Instead of using a c-style string, you would be better to use a std::string
which is dynamically sized. You can copy from/to c-style strings relatively
bool Table::Get( char* FieldName, std::string& FieldValue )
// Determine the data that FieldValue is to get. You'll probably get a
// to a c-style string somewhere returned from some database.
// for an example:
char data = "12345678";
FieldValue = data;
The key to it is assigning std::string = char* will dynamically size the
string to hold the amount of characters needed.
Now to call it:
if (tbl.Get("program", id2))
should I just return the string in regular return type like -
std::string Table::Get(char* FieldName)
You could, yes. You seem to know about std::string yet didn't realize you
could pass a reference to a std::string just as you can a char pointer.
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