How to properly handle const char* in c++

Question

bool check(const char* pass); 

1. Does const mean that I cannot modify char* inside the function?

2. Does char* c has any function like contains(char c) which checks if the char is inside char*?

3. How to get to 4th character in the char*?

4. Is there any function which gives the length of that char*. Beside checking where is '\0'?

Answer 1

Use std::string instead.

1. No, it means you can't modify the chars.

2. char* is a pointer, it doesn't have any functions. You can look up strchr.

3. pass[3]

4. strlen, but it checks for '\0' internally.