📄 c++中动态内存分配引发问题的解决方案1-开发频道-c++-天极网.mht

📁 讲述C++内存管理的文章
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=A1=A1=A1Wrong.h:=20
<BR><BR>
<TABLE borderColor=3D#ffcc66 width=3D"90%" align=3Dcenter =
bgColor=3D#e6e4dd border=3D1>
  <TBODY>
  <TR>
    <TD>#ifndef WRONG_H_<BR>#define WRONG_H_<BR>class=20
      Wrong<BR>{<BR>private:<BR>char * str; //=B4=E6=B4=A2=CA=FD=BE=DD =
<BR>int len; //=D7=D6=B7=FB=B4=AE=B3=A4=B6=C8=20
      <BR><BR>public:<BR>Wrong(const char * s); =
//=B9=B9=D4=EC=BA=AF=CA=FD <BR>Wrong(); // =
=C4=AC=C8=CF=B9=B9=D4=EC=BA=AF=CA=FD=20
      <BR>~Wrong(); // =CE=F6=B9=B9=BA=AF=CA=FD<BR>friend ostream &amp; =
operator=A3=BC=A3=BC(ostream &amp;=20
      os,const Wrong&amp; =
st);<BR>};<BR>#endif<BR><BR>Wrong.cpp:<BR><BR>#include=20
      =A3=BCiostream=A3=BE<BR>#include =A3=BCcstring=A3=BE <BR>#include =
"wrong.h"<BR>using namespace=20
      std;<BR>Wrong::Wrong(const char * s)<BR>{<BR>len =3D strlen(s); =
<BR>str =3D=20
      new char[len + 1];<BR>strcpy(str, s); =
<BR><BR>}//=BF=BD=B1=B4=CA=FD=BE=DD=20
      <BR><BR>Wrong::Wrong()<BR>{<BR>len =3D0;<BR>str =3D new=20
      =
char[len+1];<BR>str[0]=3D'\0';<BR><BR>}<BR><BR>Wrong::~Wrong()<BR>{<BR>co=
ut=A3=BC=A3=BC"=D5=E2=B8=F6=D7=D6=B7=FB=B4=AE=BD=AB=B1=BB=C9=BE=B3=FD=A3=BA=
"=A3=BC=A3=BCstr=A3=BC=A3=BC'\n';//=CE=AA=C1=CB=B7=BD=B1=E3=B9=DB=B2=EC=BD=
=E1=B9=FB=A3=AC=CC=D8=C1=F4=B4=CB=D0=D0=B4=FA=C2=EB=A1=A3=20
      <BR>delete [] str;<BR>}<BR><BR>ostream &amp; =
operator=A3=BC=A3=BC(ostream &amp; os,=20
      const Wrong &amp; st)<BR>{<BR>os =A3=BC=A3=BC st.str;<BR>return=20
      os;<BR>}<BR><BR>test_right.cpp:<BR><BR>#include =
=A3=BCiostream=A3=BE<BR>#include=20
      =A3=BCstdlib.h=A3=BE<BR>#include "Wrong.h"<BR>using namespace =
std;<BR>int=20
      main()<BR>{<BR>Wrong =
temp("=CC=EC=BC=AB=CD=F8");<BR>cout=A3=BC=A3=BCtemp=A3=BC=A3=BC'\n';=20
      <BR>system("PAUSE"); <BR>return=20
0;<BR>}</TD></TR></TBODY></TABLE><BR>=A1=A1=A1=A1=D4=CB=D0=D0=BD=E1=B9=FB=
=A3=BA<BR><BR>=A1=A1=A1=A1=CC=EC=BC=AB=CD=F8<BR><BR>=A1=A1=A1=A1=C7=EB=B0=
=B4=C8=CE=D2=E2=BC=FC=BC=CC=D0=F8. .=20
.<BR><BR>=A1=A1=A1=A1=B4=F3=BC=D2=BF=C9=D2=D4=BF=B4=B5=BD=A3=AC=D2=D4=C9=CF=
<A class=3Dbluekey href=3D"http://dev.yesky.com/"=20
target=3D_blank>=B3=CC=D0=F2</A>=CA=AE=B7=D6=D5=FD=C8=B7=A3=AC=B6=F8=C7=D2=
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test_right.cpp=CE=C4=BC=FE=BD=F8=D0=D0=B1=E0=D2=EB=A3=AC=BF=B4=BF=B4=BD=E1=
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ng.cpp:<BR><BR>
<TABLE borderColor=3D#ffcc66 width=3D"90%" align=3Dcenter =
bgColor=3D#e6e4dd border=3D1>
  <TBODY>
  <TR>
    <TD>#include =A3=BCiostream=A3=BE<BR>#include =
=A3=BCstdlib.h=A3=BE<BR>#include=20
      "Wrong.h"<BR>using namespace std;<BR>void show_right(const=20
      Wrong&amp;);<BR>void show_wrong(const =
Wrong);//=D7=A2=D2=E2=A3=AC=B2=CE=CA=FD=B7=C7=D2=FD=D3=C3=A3=AC=B6=F8=CA=C7=
=B0=B4=D6=B5=B4=AB=B5=DD=A1=A3 <BR>int=20
      main()<BR>{<BR>Wrong =
test1("=B5=DA=D2=BB=B8=F6=B7=B6=C0=FD=A1=A3");<BR>Wrong =
test2("=B5=DA=B6=FE=B8=F6=B7=B6=C0=FD=A1=A3");<BR>Wrong=20
      test3("=B5=DA=C8=FD=B8=F6=B7=B6=C0=FD=A1=A3");<BR>Wrong =
test4("=B5=DA=CB=C4=B8=F6=B7=B6=C0=FD=A1=A3");=20
      =
<BR>cout=A3=BC=A3=BC"=CF=C2=C3=E6=B7=D6=B1=F0=CA=E4=C8=EB=C8=FD=B8=F6=B7=B6=
=C0=FD=A3=BA\n";<BR>cout=A3=BC=A3=BCtest1=A3=BC=A3=BCendl;<BR>cout=A3=BC=A3=
=BCtest2=A3=BC=A3=BCendl;<BR>cout=A3=BC=A3=BCtest3=A3=BC=A3=BCendl;<BR>Wr=
ong*=20
      wrong1=3Dnew =
Wrong(test1);<BR>cout=A3=BC=A3=BC*wrong1=A3=BC=A3=BCendl;<BR>delete=20
      =
wrong1;<BR>cout=A3=BC=A3=BCtest1=A3=BC=A3=BCendl;//=D4=DADev-cpp=C9=CF=C3=
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