fork download
copy 
  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <cstring>
  4.  
  5. using namespace std;
  6. class CWin
  7. {
  8.    protected:
  9.      char id;
  10.  
  11.    public:
  12.      CWin(char i='D'):id(i)
  13.      {
  14.  
  15.      }
  16.      CWin(const CWin& win)
  17.      {
  18.         id=win.id;
  19.      }
  20. };
  21.  
  22. class CTextWin : public CWin
  23. {
  24.    private:
  25.       char *text;
  26.  
  27.    public:
  28.       CTextWin(char i, const char *tx):CWin(i)
  29.       {
  30.          text= new char[strlen(tx)+1];
  31.          strcpy(text,tx);
  32.       }
  33.       ~CTextWin()
  34.       {
  35.          delete [] text;
  36.       }
  37.       void show_member()
  38.       {
  39.          cout << "Window " << id << ": ";
  40.          cout << "text = " << text << endl;
  41.       }
  42.       void set_member(char i, const char *tx)
  43.       {
  44.          id=i;
  45.          delete [] text;
  46.          text= new char[strlen(tx)+1];
  47.          strcpy(text,tx);
  48.       }
  49. };
  50. int main(void)
  51. {
  52.    CTextWin tx1('A',"Hello C++");
  53.    CTextWin tx2(tx1);
  54.  
  55.    tx1.show_member();
  56.    tx2.show_member();
  57.  
  58.    cout << "更改tx1物件的成員之後..." << endl;
  59.    tx1.set_member('B',"Welcome  C++");
  60.  
  61.    tx1.show_member();
  62.    tx2.show_member();
  63.  
  64.    system("pause");
  65.    return 0;
  66. }
Runtime error #stdin #stdout #stderr 0s 3432KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Window A: text = Hello C++
Window A: text = Hello C++
更改tx1物件的成員之後...
Window B: text = Welcome  C++
Window A: text =
stderr
copy 
sh: pause: not found
*** Error in `./prog': double free or corruption (fasttop): 0x08cad008 ***
======= Backtrace: =========
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x75e72)[0xb74b4e72]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0x76bb0)[0xb74b5bb0]
/usr/lib/i386-linux-gnu/libstdc++.so.6(_ZdlPv+0x1f)[0xb769782f]
/usr/lib/i386-linux-gnu/libstdc++.so.6(_ZdaPv+0x1b)[0xb769787b]
./prog[0x804883e]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xf5)[0xb74588f5]
./prog[0x80488d1]
======= Memory map: ========
08048000-08049000 r-xp 00000000 08:03 1295705    /home/suhxwa/prog
08049000-0804a000 rw-p 00000000 08:03 1295705    /home/suhxwa/prog
08cad000-08cce000 rw-p 00000000 00:00 0          [heap]
b743d000-b743f000 rw-p 00000000 00:00 0 
b743f000-b75e8000 r-xp 00000000 08:03 1303839    /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b75e8000-b75e9000 ---p 001a9000 08:03 1303839    /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b75e9000-b75eb000 r--p 001a9000 08:03 1303839    /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b75eb000-b75ec000 rw-p 001ab000 08:03 1303839    /lib/i386-linux-gnu/i686/cmov/libc-2.17.so
b75ec000-b75ef000 rw-p 00000000 00:00 0 
b75ef000-b760a000 r-xp 00000000 08:03 1303883    /lib/i386-linux-gnu/libgcc_s.so.1
b760a000-b760b000 rw-p 0001a000 08:03 1303883    /lib/i386-linux-gnu/libgcc_s.so.1
b760b000-b760c000 rw-p 00000000 00:00 0 
b760c000-b764d000 r-xp 00000000 08:03 1303836    /lib/i386-linux-gnu/i686/cmov/libm-2.17.so
b764d000-b764e000 r--p 00040000 08:03 1303836    /lib/i386-linux-gnu/i686/cmov/libm-2.17.so
b764e000-b764f000 rw-p 00041000 08:03 1303836    /lib/i386-linux-gnu/i686/cmov/libm-2.17.so
b764f000-b772b000 r-xp 00000000 08:03 1345926    /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b772b000-b772c000 ---p 000dc000 08:03 1345926    /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b772c000-b7730000 r--p 000dc000 08:03 1345926    /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b7730000-b7731000 rw-p 000e0000 08:03 1345926    /usr/lib/i386-linux-gnu/libstdc++.so.6.0.18
b7731000-b7738000 rw-p 00000000 00:00 0 
b773a000-b773e000 rw-p 00000000 00:00 0 
b773e000-b773f000 r-xp 00000000 00:00 0          [vdso]
b773f000-b775e000 r-xp 00000000 08:03 1303796    /lib/i386-linux-gnu/ld-2.17.so
b775e000-b775f000 r--p 0001f000 08:03 1303796    /lib/i386-linux-gnu/ld-2.17.so
b775f000-b7760000 rw-p 00020000 08:03 1303796    /lib/i386-linux-gnu/ld-2.17.so
bfa55000-bfa6a000 rw-p 00000000 00:00 0          [stack]
https://ideone.com/4ah1hg
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!