Question

checkFormat(string &s)
{

}

string s is a string that indicate the date.

I want to compare a string s, to find whether it is in terms of “yyyy:mm::dd” or not.

What should I do?

compare it char by char? What if the string is “600:12:01” ?

Sorry for my poor English.

Answer 1

Don’t use regex. Use strptime(), which is designed to parse time strings (hence the name: str p time, string -> parse -> time). A regex can’t figure out that 2013:2:29 is invalid.