(Using string Iterators) Write a program using iterators that demonstrates the use of func- tions rbegin and rend.

Question

What will be an ideal response?

Answer 1

```
// Program demonstrates rend and rbegin.
#include
#include
using namespace std;

int main()
{
string s( "abcdefghijklmnopqrstuvwxyz" ); // declare string s

// re is set to the end of the reverse sequence of s
string::reverse_iterator re = s.rend();

// rb is set to the beginning of the reverse sequence of s
string::reverse_iterator rb = s.rbegin();

cout << "Using rend() string is: ";

// print from the end of the reversed string to the beginning
while ( re >= s.rbegin() )
{
cout << *re;
re--;
} // end while

cout << "\nUsing rbegin() string is: ";

// print from the beginning of the reversed string
while ( rb != s.rend() )
{
cout << *rb;
rb++;
} // end while

cout << endl;
} // end main
```
Using rend() string is: abcdefghijklmnopqrstuvwxyz
Using rbegin() string is: zyxwvutsrqponmlkjihgfedcba