95 lines
1.3 KiB
C++
95 lines
1.3 KiB
C++
#include <new>
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#include <memory>
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#include <cstdio>
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struct test{
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int a;
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float b;
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};
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class base {
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protected:
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int a;
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public:
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base() : a(0){
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printf("Executing default base class constructor. a: %i\n", a);
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}
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virtual ~base(){
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printf("Executing base class destructor\n");
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}
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virtual void print(){
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printf("Base class print function with a=%i\n", a);
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}
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};
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class sub : public base{
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protected:
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float f;
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public:
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sub() : f(0){
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printf("Executing default sub class constructor. a: %i, f: %f\n", base::a, f);
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}
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virtual ~sub(){
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printf("Executing sub class destructor\n");
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}
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virtual void print(){
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printf("Sub class print function with a=%i and f=%f\n", a, f);
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}
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};
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int main(){
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test * temp = new test;
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temp->a = 5;
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delete temp;
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temp = 0;
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temp = new test[25];
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delete [] temp;
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temp = 0;
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base * b = new base;
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b->print();
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delete b;
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b=0;
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b = new base[3];
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for(int i = 0; i < 3; ++i){
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b[i].print();
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}
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delete [] b;
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b = 0;
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b = new sub;
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b->print();
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delete b;
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b = 0;
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//We can only create one because we can't step through the array properly
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b = new sub[1];
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b[0].print();
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delete [] b;
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b = 0;
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printf("Testing nothrow new\n");
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b = new(std::nothrow) base;
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printf("Checking allocator\n");
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std::allocator<base> al;
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b = al.allocate(1);
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al.construct(b, base());
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b->print();
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al.destroy(b);
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al.deallocate(b, 1);
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b = 0;
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return 0;
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}
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