59 lines
892 B
C++
59 lines
892 B
C++
#include <iostream>
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#include <list>
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#include <string>
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#include <forward_list>
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using namespace std;
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class HasPtr {
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public:
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explicit HasPtr(const std::string &s = std::string()) :
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ps(new std::string(s)), i(0) {}
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//copy constructor
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HasPtr(const HasPtr& ptr);
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//copy assignment operator
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HasPtr& operator=(const HasPtr& ptr);
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//destructor
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~HasPtr(){
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delete ps;
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}
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private:
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std::string *ps;
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int i;
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};
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HasPtr::HasPtr(const HasPtr& ptr){
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ps = new string(*ptr.ps);
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i = ptr.i;
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}
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HasPtr& HasPtr::operator=(const HasPtr& ptr){
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delete ps;
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ps = new string(*ptr.ps);
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i = ptr.i;
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return *this;
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}
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HasPtr f(HasPtr fp){
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HasPtr ret = fp;
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return ret;
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}
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int main(){
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HasPtr ptr1("2020");
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HasPtr ptr2("2019");
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HasPtr ptr3 = ptr2;
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forward_list<int> li({ 4, 5, 6 });
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for (int e : li)
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cout << e << " ";
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ptr2 = ptr1;
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ptr3 = ptr1;
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f(ptr1);
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system("pause");
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return 0;
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}
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