C++ Program. using namespace std, and iostream library only. no ascii

Write a function, ReplaceHashTag, that takes a string as input and replaces all the hashtags (#) characters with @ character. The function returns a string representing input string containing # character replaced with @ character.

Your function should be named ReplaceHashTag

Your function has one input argument of type string

Your function has one return value of type string representing input string containing # character replaced with @ character.

Your function should not print anything

thanks in advance