Error: invalid operands of types ‘const char [35]’ and ‘const char [2]’ to binary ‘operator+’

Question

At the top of my file I have

#define AGE \"42\"

Later in the file I use ID multiple times including some lines that look like

Answer 1

In line 2, there's a std::string involved (name). There are operations defined for char[] + std::string, std::string + char[], etc. "Hello " + name gives a std::string, which is added to " you are ", giving another string, etc.

In line 3, you're saying

char[] + char[] + char[]

and you can't just add arrays to each other.