How do I read in a c-string in to a character array without knowing the size of the string that the user will enter ?
Reading in to a character array of unknown size
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Without any code or further description of your issue it's hard to know what you're trying to achieve, but, one of the following might be appropriate for your needs:
Use a preallocated array of some maximum size you know is greater than the number of characters that will be entered.
Create an empty std::string, and then use the string "+=" operator for each character entered. Then you can convert back to an array using the c_str() method.