Create a function check(s) that determines if its argument is a string in the format [i], where i is a non-negative integer. For example, the string "[34]" is valid. Spaces are allowed before the first bracket, after the second bracket, and to the left and right of the integer, so that the string " [     34       ] " is also valid. The argument is a C++ string. The function returns true or false. Use string streams.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Create a function check(s) that determines if its argument is a string in
the format [i], where i is a non-negative integer. For example, the string "[34]"
is valid. Spaces are allowed before the first bracket, after the second bracket, and
to the left and right of the integer, so that the string " [     34       ] " is also
valid. The argument is a C++ string. The function returns true or false. Use
string streams. 

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