实验验证stack和heap中是否被设初值

2024-08-23 12:52:11

#include <iostream>

#include <stdlib.h>

using namespace std;

class Foo

{

public:

int i;

float f;

char *cp;

};

int main()

{

Foo f1;

if(f1.cp == 0) cout <<" in stack,f1.cp is null "<< endl;

cout<< f1.i << " " << f1.f <<" "<<f1.cp << endl;

Foo *pf = new Foo();

if(pf->cp == 0) cout <<" in heap,pf.cp is null "<< endl;

cout << pf->i << " " << pf->f << " "<< pf->cp <<endl;

return 0;

}

/work/ctest/insideTheC++ObjectModel$ ./1
770374040 4.55997e-41 H�l$�L�d$�H�-
in heap,pf.cp is null
0 0

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