index: 
hello1
hello2
hello3
hello4
source: hello.zip
hello2.cpp
hello2.cpp
adds a member variable that distinguishes one world
from others. We instantiate objects inside a loop (local scope)
and use new/delete to create an object on the heap.
#include <iostream> #include <string> using namespace std; string worlds[] = {"Mercury","Venus","Earth","Mars","Jupiter","Saturn","Uranus","Neptune"}; int count = 0; class theWorld { public: theWorld() { instance = count++; cout << "Hello from " + worlds[instance] << endl; } ~theWorld() { cout << "Goodbye from " + worlds[instance] << endl; } int instance; }; theWorld myWorld; int main() { cout << "Hello from main program.\n"; theWorld *pworld = new theWorld(); for (int i=0; i<2; i++) { theWorld loopWorld; } delete pworld; cout << "Goodbye from main program.\n"; return 0; }
C:\classes\ece538\work\hello>hello2 Hello from Mercury Hello from main program. Hello from Venus Hello from Earth Goodbye from Earth Hello from Mars Goodbye from Mars Goodbye from Venus Goodbye from main program. Goodbye from Mercury
Maintained by John Loomis, updated Tue Jan 23 20:45:01 2007