Please give me in c++ language.
7 THE REPEAT FRONT PROBLEM Given as input a string and an int n, set result to a string made of the first n characters of the string, followed by the first n-1 characters of the string, and so on. You may assume that n is between 0 and the length of the string, inclusive (i.e. n >= 0 and n <= str·length()). for input
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