C++: Containers: Example 1 Using Array

// Read words and print them in reverse order.
//   Variation 1: Fixed array sizes, use new to copy word.
// Fred Swartz 2001-11-08, 2001-12-04

#include <iostream>  // for cin, cout
#include <cstring>   // for strlen, strcpy
using namespace std;

int main() {

    char *allwords[1000]; // array of POINTERS to char strings
    char word[500];       // input buffer for longest possible word.
    int n = 0;            // count of number of words.

    // read words/tokens from input stream
    while (cin >> word) {
        allwords[n] = new char[strlen(word)+1]; // allocate space
        strcpy(allwords[n], word);      // copy word to new space
        n++;
    }

    cout << "Number of words = " << n << endl;

    // write out all the words in reverse order.
    //    The dynamically allocated space is freed after the word
    //    is printed, and the pointer is set to NULL.  This isn't
    //    necessary here because the program immediately terminates,
    //    but it's a good, safe practice.
    for (int i=n-1; i>=0; i--) {
        cout << allwords[i] << endl; // print the word
        delete [] allwords[i];       // free space
        allwords[i] = NULL;          // remove pointer
    }
    return 0;
}//end main