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1.寫出下面程序的輸出
class abc;
void del(abc *pobj){ delete pobj; } class abc{
public: abc(){ printf("abc\r\n"); } ~abc(){ printf("~abc\r\n"); } }; int main() { abc *pobj = new abc; del(pobj); } 2.寫出下面程序的輸出
void* operator new(size_t size)
{ printf("malloc %u\r\n", size); return malloc(size); } void operator delete(void *memblock){ printf("free\r\n"); return free(memblock); } class abc{
public: abc(){ printf("abc\r\n"); throw int(); } ~abc(){ printf("~abc\r\n"); } }; int main(){
try{ new abc; }catch(int& i){ printf("%d\r\n", i); } return 0; } 3.寫出下面程序的輸出
template <typename T>
class abc{ public: abc(){ printf("primary\r\n"); } }; template<>
abc<int>::abc(){ printf("member spec\r\n"); }; template<typename T, typename P>
class abc<T (*)(P)>{ public: abc(){ printf("partial spec\r\n"); } }; int main()
{ abc<void* (*)(int)> f_abc; abc<int> i_abc; } 4.下面的代碼能否通過編譯？為什么 class a{
public: virtual ~a(){ } private: void operator delete(void *p); }; int main()
{ a _1; } |
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