using an iterator.

i want to type in a word and for my program to output it backwards. but i have to use an iterator.
ex: "clue" and it should print it out "eulc"
this is what i have so far.

Code:

---

#include <iostream>
#include<string>
using namespace std;

int main(){
 
        string s;

        cout << "Enter a word: ";
        getline( cin, s );

        string::iterator r;
        r = s.begin();

        while ( r != s.end() ){
                        cout<< *r;                       
                        r++;
        }
        cout<<endl;

        return (0);
}

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Hi, not the prettiest implementation ever, but it works - for more than just a single word also. take a look at it and fiddle with it!

Code:

---

#include <iostream>
#include<string>
using namespace std;

// get a whole line, char by char from cin
int getPhrase(string &buffer)
{
        char buff;
        while(buff != '\n')
        {
                cin.get(buff);
                buffer += buff;
        }
        return buffer.length();
}


int main(){
    // origional
        string s;
        // reversed
        string reverse;       

        cout << "Enter a phrase: ";
        int len = getPhrase(s);
       
        for(int i=0;i<=len;i++)
        {
                // reverse the string
                reverse += s[len-i];
        }
        cout << reverse << endl;
        //(fanfare!)

        return 0;
}

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There are quite a few ways to do this, here's one:

Code:

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std::copy(s.rbegin(), s.rend(), std::ostream_iterator<std::string::value_type> (std::cout));

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Quote:

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Originally Posted by Plasmator

There are quite a few ways to do this, here's one:

Code:

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std::copy(s.rbegin(), s.rend(), std::ostream_iterator<std::string::value_type> (std::cout));

---

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i dont quite understand what you meant by that im a beginner to c++
and HJK i need a way to make it print backward within the iterator.

Quote:

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Originally Posted by ptg

i dont quite understand what you meant by that im a beginner to c++

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Based on your original example, here's the for-loop equivalent:

Code:

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for(std::string::const_reverse_iterator r = s.rbegin(), end = s.rend(); r != end; ++r)
{
    std::cout << *r;
}

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Provided that you don't need to reverse the contents of the string itself.

oh is that im learning it in another way so your code seemed strange to me but i have seen it like that before. thanks for the help

okay i got it to work but it loops it too many times. i only want it to print once

never mind i figured it out