Convert char* to string C++

Or, if the string already exists: Edit: I’m still not completely sure I understand the question. But if it’s something like what JoshG is suggesting, that you want up to length characters, or until a null terminator, whichever comes first, then you can use this:

Identifier is undefined

From the update 2 and after narrowing down the problem scope, we can easily find that there is a brace missing at the end of the function addWord. The compiler will never explicitly identify such a syntax error. instead, it will assume that the missing function definition located in some other object file. The linker will … Read more

What is the difference between isdigit() and isnumber()?

isnumber() may be an Apple-specific C++ method (I don’t have a Mac on hand to check). You can see it in the Apple dev guide: The isnumber() function behaves similarly to isdigit(), but may recognize additional characters, depending on the current locale setting. Besides, isnumber() is not declared on Linux: I use g++ 6.1.1 on Linux 4.7.2 and get the error: I … Read more

How do conversion operators work in C++?

Some random situations where conversion functions are used and not used follow. First, note that conversion functions are never used to convert to the same class type or to a base class type. Conversion during argument passing Conversion during argument passing will use the rules for copy initialization. These rules just consider any conversion function, … Read more

Checking cin input stream produces an integer

You can check like this: Furthermore, you can continue to get input until you get an int via: EDIT: To address the comment below regarding input like 10abc, one could modify the loop to accept a string as an input. Then check the string for any character not a number and handle that situation accordingly. … Read more

What does “missing template argument” mean?

I’m pretty new to C++ and this site so there are bound to be errors. When I try to compile my code I get errors like error: missing template argument before ‘b’. I’ve been searching the world for answers for hours and it has led me here. My assignment is to implement a templated class Collection … Read more

Compiling a C++ program with gcc

gcc can actually compile c++ code just fine. The errors you received are linker errors, not compiler errors. Odds are that if you change the compilation line to be this: which makes it link to the standard c++ library, then it will work just fine. However, you should just make your life easier and use g++. EDIT: … Read more