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  1. #include <iostream>
  2. #include <vector>
  3. #include <cstring>
  4. using namespace std;
  5.  
  6. class A
  7. {
  8. public:
  9.     A(const char *str)
  10.     {
  11.         cptr = new char [strlen(str)];
  12.         strcpy(cptr,str);
  13.         cout<<"A(const char *str) called and cptr is "<<cptr<<endl;
  14.     }
  15.     A(const A &a)
  16.     {
  17.         cptr = new char [strlen(a.cptr)+1];
  18.         strcpy(this->cptr,a.cptr);
  19.         cptr[strlen(a.cptr)] = '$';
  20.         cptr[strlen(a.cptr)+1] = '\0';
  21.         cout<<"A(const A &a) called and cptr is "<<cptr<<endl;
  22.     }
  23.     ~A()
  24.     {
  25.         cout<<"~A() called and cptr is "<<cptr<<endl;
  26.         delete [] cptr;
  27.     }
  28. private:
  29.     char *cptr;
  30. };
  31.  
  32.  
  33. int main()
  34. {
  35.     A a1("1"),a2("2"),a3("3");
  36.     vector<A> Avec;
  37.     Avec.reserve(256);
  38.  
  39.     Avec.push_back(a1);
  40.     Avec.push_back(a2);
  41.     Avec.push_back(a3);
  42. }
Success #stdin #stdout 0s 3036KB
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stdin
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Standard input is empty
stdout
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A(const char *str) called and cptr is 1
A(const char *str) called and cptr is 2
A(const char *str) called and cptr is 3
A(const A &a) called and cptr is 1$
A(const A &a) called and cptr is 2$
A(const A &a) called and cptr is 3$
~A() called and cptr is 1$
~A() called and cptr is 2$
~A() called and cptr is 3$
~A() called and cptr is 3
~A() called and cptr is 2
~A() called and cptr is 1
https://ideone.com/qhnWs8
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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