📄 踏入c++中的雷区——c++内存管理详解2-开发频道-c++-天极网.mht

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      endl;<BR>=A1=A1free(str); =
<BR>}</TD></TR></TBODY></TABLE>=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=
=CA=BE=C0=FD4.3=20
=D3=C3=BA=AF=CA=FD=B7=B5=BB=D8=D6=B5=C0=B4=B4=AB=B5=DD=B6=AF=CC=AC=C4=DA=B4=
=E6<BR><BR>=A1=A1=A1=A1=D3=C3=BA=AF=CA=FD=B7=B5=BB=D8=D6=B5=C0=B4=B4=AB=B5=
=DD=B6=AF=CC=AC=C4=DA=B4=E6=D5=E2=D6=D6=B7=BD=B7=A8=CB=E4=C8=BB=BA=C3=D3=C3=
=A3=AC=B5=AB=CA=C7=B3=A3=B3=A3=D3=D0=C8=CB=B0=D1return=D3=EF=BE=E4=D3=C3=B4=
=ED=C1=CB=A1=A3=D5=E2=C0=EF=C7=BF=B5=F7=B2=BB=D2=AA=D3=C3return=D3=EF=BE=E4=
=B7=B5=BB=D8=D6=B8=CF=F2=A1=B0=D5=BB=C4=DA=B4=E6=A1=B1=B5=C4=D6=B8=D5=EB=A3=
=AC=D2=F2=CE=AA=B8=C3=C4=DA=B4=E6=D4=DA=BA=AF=CA=FD=BD=E1=CA=F8=CA=B1=D7=D4=
=B6=AF=CF=FB=CD=F6=A3=AC=BC=FB=CA=BE=C0=FD4.4=A1=A3<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
  <TBODY>
  <TR>
    <TD>char *GetString(void)<BR>{<BR>=A1=A1char p[] =3D "hello =
world";<BR>=A1=A1return p;=20
      // =B1=E0=D2=EB=C6=F7=BD=AB=CC=E1=B3=F6=BE=AF=B8=E6<BR>}<BR>void =
Test4(void)<BR>{<BR>=A1=A1char *str =3D NULL;<BR>=A1=A1str =3D=20
      GetString(); // str =
=B5=C4=C4=DA=C8=DD=CA=C7=C0=AC=BB=F8<BR>=A1=A1cout&lt;&lt; str &lt;&lt;=20
  =
endl;<BR>}</TD></TR></TBODY></TABLE>=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=CA=
=BE=C0=FD4.4=20
return=D3=EF=BE=E4=B7=B5=BB=D8=D6=B8=CF=F2=A1=B0=D5=BB=C4=DA=B4=E6=A1=B1=B5=
=C4=D6=B8=D5=EB<BR><BR>=A1=A1=A1=A1=D3=C3=B5=F7=CA=D4=C6=F7=D6=F0=B2=BD=B8=
=FA=D7=D9Test4=A3=AC=B7=A2=CF=D6=D6=B4=D0=D0str =3D=20
GetString=D3=EF=BE=E4=BA=F3str=B2=BB=D4=D9=CA=C7NULL=D6=B8=D5=EB=A3=AC=B5=
=AB=CA=C7str=B5=C4=C4=DA=C8=DD=B2=BB=CA=C7=A1=B0hello=20
world=A1=B1=B6=F8=CA=C7=C0=AC=BB=F8=A1=A3<BR>=C8=E7=B9=FB=B0=D1=CA=BE=C0=FD=
4.4=B8=C4=D0=B4=B3=C9=CA=BE=C0=FD4.5=A3=AC=BB=E1=D4=F5=C3=B4=D1=F9=A3=BF<=
BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
  <TBODY>
  <TR>
    <TD>char *GetString2(void)<BR>{<BR>=A1=A1char *p =3D "hello =
world";<BR>=A1=A1return=20
      p;<BR>}<BR>void Test5(void)<BR>{<BR>=A1=A1char *str =3D =
NULL;<BR>=A1=A1str =3D=20
      GetString2();<BR>=A1=A1cout&lt;&lt; str &lt;&lt;=20
endl;<BR>}</TD></TR></TBODY></TABLE>=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=CA=BE=C0=
=FD4.5=20
return=D3=EF=BE=E4=B7=B5=BB=D8=B3=A3=C1=BF=D7=D6=B7=FB=B4=AE<BR><BR>=A1=A1=
=A1=A1=BA=AF=CA=FDTest5=D4=CB=D0=D0=CB=E4=C8=BB=B2=BB=BB=E1=B3=F6=B4=ED=A3=
=AC=B5=AB=CA=C7=BA=AF=CA=FDGetString2=B5=C4=C9=E8=BC=C6=B8=C5=C4=EE=C8=B4=
=CA=C7=B4=ED=CE=F3=B5=C4=A1=A3=D2=F2=CE=AAGetString2=C4=DA=B5=C4=A1=B0hel=
lo=20
world=A1=B1=CA=C7=B3=A3=C1=BF=D7=D6=B7=FB=B4=AE=A3=AC=CE=BB=D3=DA=BE=B2=CC=
=AC=B4=E6=B4=A2=C7=F8=A3=AC=CB=FC=D4=DA=B3=CC=D0=F2=C9=FA=C3=FC=C6=DA=C4=DA=
=BA=E3=B6=A8=B2=BB=B1=E4=A1=A3=CE=DE=C2=DB=CA=B2=C3=B4=CA=B1=BA=F2=B5=F7=D3=
=C3GetString2=A3=AC=CB=FC=B7=B5=BB=D8=B5=C4=CA=BC=D6=D5=CA=C7=CD=AC=D2=BB=
=B8=F6=A1=B0=D6=BB=B6=C1=A1=B1=B5=C4=C4=DA=B4=E6=BF=E9=A1=A3<BR><BR>=A1=A1=
=A1=A1<B>5=A1=A2=B6=C5=BE=F8=A1=B0=D2=B0=D6=B8=D5=EB=A1=B1</B><BR><BR>=A1=
=A1=A1=A1=A1=B0=D2=B0=D6=B8=D5=EB=A1=B1=B2=BB=CA=C7NULL=D6=B8=D5=EB=A3=AC=
=CA=C7=D6=B8=CF=F2=A1=B0=C0=AC=BB=F8=A1=B1=C4=DA=B4=E6=B5=C4=D6=B8=D5=EB=A1=
=A3=C8=CB=C3=C7=D2=BB=B0=E3=B2=BB=BB=E1=B4=ED=D3=C3NULL=D6=B8=D5=EB=A3=AC=
=D2=F2=CE=AA=D3=C3if=D3=EF=BE=E4=BA=DC=C8=DD=D2=D7=C5=D0=B6=CF=A1=A3=B5=AB=
=CA=C7=A1=B0=D2=B0=D6=B8=D5=EB=A1=B1=CA=C7=BA=DC=CE=A3=CF=D5=B5=C4=A3=ACi=
f=D3=EF=BE=E4=B6=D4=CB=FC=B2=BB=C6=F0=D7=F7=D3=C3=A1=A3=20
=A1=B0=D2=B0=D6=B8=D5=EB=A1=B1=B5=C4=B3=C9=D2=F2=D6=F7=D2=AA=D3=D0=C1=BD=D6=
=D6=A3=BA<BR><BR>=A1=A1=A1=A1=A3=A81=A3=A9=D6=B8=D5=EB=B1=E4=C1=BF=C3=BB=D3=
=D0=B1=BB=B3=F5=CA=BC=BB=AF=A1=A3=C8=CE=BA=CE=D6=B8=D5=EB=B1=E4=C1=BF=B8=D5=
=B1=BB=B4=B4=BD=A8=CA=B1=B2=BB=BB=E1=D7=D4=B6=AF=B3=C9=CE=AANULL=D6=B8=D5=
=EB=A3=AC=CB=FC=B5=C4=C8=B1=CA=A1=D6=B5=CA=C7=CB=E6=BB=FA=B5=C4=A3=AC=CB=FC=
=BB=E1=C2=D2=D6=B8=D2=BB=C6=F8=A1=A3=CB=F9=D2=D4=A3=AC=D6=B8=D5=EB=B1=E4=C1=
=BF=D4=DA=B4=B4=BD=A8=B5=C4=CD=AC=CA=B1=D3=A6=B5=B1=B1=BB=B3=F5=CA=BC=BB=AF=
=A3=AC=D2=AA=C3=B4=BD=AB=D6=B8=D5=EB=C9=E8=D6=C3=CE=AANULL=A3=AC=D2=AA=C3=
=B4=C8=C3=CB=FC=D6=B8=CF=F2=BA=CF=B7=A8=B5=C4=C4=DA=B4=E6=A1=A3=C0=FD=C8=E7=
<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
  <TBODY>
  <TR>
    <TD>char *p =3D NULL;<BR>char *str =3D (char *)=20
malloc(100);</TD></TR></TBODY></TABLE><BR>=A1=A1=A1=A1=A3=A82=A3=A9=D6=B8=
=D5=EBp=B1=BBfree=BB=F2=D5=DFdelete=D6=AE=BA=F3=A3=AC=C3=BB=D3=D0=D6=C3=CE=
=AANULL=A3=AC=C8=C3=C8=CB=CE=F3=D2=D4=CE=AAp=CA=C7=B8=F6=BA=CF=B7=A8=B5=C4=
=D6=B8=D5=EB=A1=A3<BR><BR>=A1=A1=A1=A1=A3=A83=A3=A9=D6=B8=D5=EB=B2=D9=D7=F7=
=B3=AC=D4=BD=C1=CB=B1=E4=C1=BF=B5=C4=D7=F7=D3=C3=B7=B6=CE=A7=A1=A3=D5=E2=D6=
=D6=C7=E9=BF=F6=C8=C3=C8=CB=B7=C0=B2=BB=CA=A4=B7=C0=A3=AC=CA=BE=C0=FD=B3=CC=
=D0=F2=C8=E7=CF=C2=A3=BA<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
  <TBODY>
  <TR>
    <TD>class A <BR>{ <BR>=A1=A1public:<BR>=A1=A1=A1=A1void Func(void){ =
cout &lt;&lt; =A1=B0Func=20
      of class A=A1=B1 &lt;&lt; endl; }<BR>};<BR>void =
Test(void)<BR>{<BR>=A1=A1A=20
      *p;<BR>=A1=A1{<BR>=A1=A1=A1=A1A a;<BR>=A1=A1=A1=A1p =3D &amp;a; // =
=D7=A2=D2=E2 a =
=B5=C4=C9=FA=C3=FC=C6=DA<BR>=A1=A1}<BR>=A1=A1p-&gt;Func();=20
      //=20
p=CA=C7=A1=B0=D2=B0=D6=B8=D5=EB=A1=B1<BR>}</TD></TR></TBODY></TABLE><BR>=A1=
=A1=A1=A1=BA=AF=CA=FDTest=D4=DA=D6=B4=D0=D0=D3=EF=BE=E4p-&gt;Func()=CA=B1=
=A3=AC=B6=D4=CF=F3a=D2=D1=BE=AD=CF=FB=CA=A7=A3=AC=B6=F8p=CA=C7=D6=B8=CF=F2=
a=B5=C4=A3=AC=CB=F9=D2=D4p=BE=CD=B3=C9=C1=CB=A1=B0=D2=B0=D6=B8=D5=EB=A1=B1=
=A1=A3=B5=AB=C6=E6=B9=D6=B5=C4=CA=C7=CE=D2=D4=CB=D0=D0=D5=E2=B8=F6=B3=CC=D0=
=F2=CA=B1=BE=D3=C8=BB=C3=BB=D3=D0=B3=F6=B4=ED=A3=AC=D5=E2=BF=C9=C4=DC=D3=EB=
=B1=E0=D2=EB=C6=F7=D3=D0=B9=D8=A1=A3<BR><BR>
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