Please Help. C++

Question

String Trim1

Write a function stringTrim that removes the first and last characters from a given string. "chello" should become "hell". 

Your function must work correctly given the code in main shown below. Examine it to decide if you should return the new value or use a reference parameter.

int main()

{

string word = "bob";

stringTrim(word);

cout << word << endl;

}

Code:

#include <iostream>

#include <string>

using namespace std;

//Do not modify anything on or above the line below this

//YOUR_CODE_BELOW

//YOUR_FUNCTION HERE

//YOUR_CODE_ABOVE

//Do not modify anything on or below the line above this

int main()

{

string word;

cin >> word;

stringTrim(word);

cout << word<< endl;

}

Answer 1

The standard library contains a string method called "substr" that can be used to create a substring of an existing string. It's included in string.h. Usage:

#include <string.h>

using namespace std;

// ...

string s1 = "...";

string s2 = s2.substr(3,5);

Where the two arguments are the starting position and length of the substring.

You can also create a substring by writing a loop to iterate through the individual characters and using them to create a new string.

Note that stringTrim() doesn't return a value other than through the parameter list.