Can anyone help me with these please.
suffix_of_length(length) : Displays a suffix of the specified length from the current string. If the length is <= 0 then display a blank line (just a cout << endl). If the length is greater than the length of the current string, then display the current string.
starts_with(str) : Displays either "true" or "false" (without quotes) based on whether or not the current string starts with the specified string parameter. This does NOT change the current string. Note that the string parameter could potentially be longer than the current string, in which case you would display false.
string_reverse : Reverses the current string AND then displays it on one line.
is_integer : Displays either "true" or "false", without quotes, based on whether or not the current
string is an integer value. The following are requirements for a string to represent an integer:
If it starts with a minus character, then it must contain at least one numeric character after this, and satisfy all the other requirements as well
Other than the optional minus character at the start and the null-terminator at the end, every character in the string must be a numeric digit, [0-9]. Note that this implies that not even whitespace is allowed.