Question

I want to remove the first character of a string using memmove

Example, a std::string might contain:

./Folder/File.txt

I want to remove the .

I am doing:

if (newStr[0] == '.')
{
    memmove(newStr, newStr+1, strlen(newStr));
}

and getting an error: error: no match for 'operator+' in 'newStr + 1'

What mistake am I making?

UPDATE: oh, I think I should be using char* this wont work on a std::string

Answer 1

It appears like your newStr is a std::string, in this case you should use newStr.erase(0,1);

See this site for more information about erase

memmove is only valid if you are dealing with a buffer directly (char* or char[]). If your type is std::string, use the function that’s meant for it (erase) and don’t try memmove on the c_str.