컴퓨터언어쪽 간단한 영어문장인데 해석좀 할수있을까요

Find content in string Searches the string for the first occurrence of the sequence specified by its arguments.

When pos is specified, the search only includes characters at or after position pos,

ignoring any possible occurrences that include characters before pos.

Notice that unlike member find_first_of, whenever more than one character is being searched for,

it is not enough that just one of these characters match, but the entire sequence must match.

What is string::npos?

Maximum value for size_t

npos is a static member constant value with the greatest possible value for an element of type size_t.

This value, when used as the value for a len (or sublen) parameter in string's member functions, means "until the end of the string". As a return value,

it is usually used to indicate no matches.

This constant is defined with a value of -1, which because size_t is an unsigned integral type, it is the largest possible representable value for this type.

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