?? ptrstr.cpp
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// ptrstr.cpp -- using pointers to strings
#include <iostream>
#include <cstring> // declare strlen(), strcpy()
int main()
{
using namespace std;
char animal[20] = "bear"; // animal holds bear
const char * bird = "wren"; // bird holds address of string
char * ps; // uninitialized
cout << animal << " and "; // display bear
cout << bird << "\n"; // display wren
cout << ps << "\n"; //may display garbage, may cause a crash
cout << "Enter a kind of animal: ";
cin >> animal; // ok if input < 20 chars
// cin >> ps; Too horrible a blunder to try; ps doesn't
// point to allocated space
ps = animal; // set ps to point to string
cout << ps << "s!\n"; // ok, same as using animal
cout << "Before using strcpy():\n";
cout << animal << " at " << (int *) animal << endl;
cout << ps << " at " << (int *) ps << endl;
ps = new char[strlen(animal) + 1]; // get new storage
strcpy(ps, animal); // copy string to new storage
cout << "After using strcpy():\n";
cout << animal << " at " << (int *) animal << endl;
cout << ps << " at " << (int *) ps << endl;
delete [] ps;
return 0;
}
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