Regex to allow only one word followed by a url -

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i doing this

std::string reg ="^/house/room/section/.*"

this allows user pass word after section program picks , uses.however want user able put in 1 word not sentence after section. how can modify (.*) not have space in it. instance 

/house/room/section/a1343         allowed /house/room/section/a1343 a1002   not allowed because space found inside follow word

you use character class disallows spaces, so:

[^ ]*

or specify non-whitespace characters:

\s*

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