📄 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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<DIV id=3Dcontitle>
<H1 =
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<DIV id=3Dconauthor><SPAN>2006-04-25 09:22 =
</SPAN><SPAN>=D7=F7=D5=DF=A3=BA </SPAN><SPAN>=B3=F6=B4=A6=A3=BA=20
=BC=C6=CB=E3=BB=FA=BD=CC=D1=A7=CD=F8 =
</SPAN><SPAN>=D4=F0=C8=CE=B1=E0=BC=AD=A3=BA>=B7=BD=D6=DB</SPAN></DIV>
<DIV class=3Dtopadbg><SPAN id=3Dad9></SPAN></DIV>
<DIV id=3Dconneirong><SPAN id=3Dad3></SPAN>
<DIV id=3Dartibody><!-- Error -->
<DIV class=3Dclear></DIV>
<DIV class=3Dguanggao><SPAN=20
id=3DcontentAdv></SPAN></DIV>=A1=A1=A1=A1<B>4=A1=A2=D6=B8=D5=EB=B2=CE=CA=FD=
=CA=C7=C8=E7=BA=CE=B4=AB=B5=DD=C4=DA=B4=E6=B5=C4=A3=BF</B><BR><BR>=A1=A1=A1=
=A1=C8=E7=B9=FB=BA=AF=CA=FD=B5=C4=B2=CE=CA=FD=CA=C7=D2=BB=B8=F6=D6=B8=D5=EB=
=A3=AC=B2=BB=D2=AA=D6=B8=CD=FB=D3=C3=B8=C3=D6=B8=D5=EB=C8=A5=C9=EA=C7=EB=B6=
=AF=CC=AC=C4=DA=B4=E6=A1=A3=CA=BE=C0=FD7-4-1=D6=D0=A3=ACTest=BA=AF=CA=FD=B5=
=C4=D3=EF=BE=E4GetMemory(str,=20
200)=B2=A2=C3=BB=D3=D0=CA=B9str=BB=F1=B5=C3=C6=DA=CD=FB=B5=C4=C4=DA=B4=E6=
=A3=ACstr=D2=C0=BE=C9=CA=C7NULL=A3=AC=CE=AA=CA=B2=C3=B4=A3=BF<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
<TBODY>
<TR>
<TD>void GetMemory(char *p, int num)<BR>{<BR>=A1=A1p =3D (char=20
*)malloc(sizeof(char) * num);<BR>}<BR>void =
Test(void)<BR>{<BR>=A1=A1char *str =3D=20
NULL;<BR>=A1=A1GetMemory(str, 100); // str =C8=D4=C8=BB=CE=AA NULL =
<BR>=A1=A1strcpy(str, "hello");=20
// =
=D4=CB=D0=D0=B4=ED=CE=F3<BR>}</TD></TR></TBODY></TABLE>=A1=A1=A1=A1=A1=A1=
=A1=A1=A1=A1=A1=A1=CA=BE=C0=FD4.1=20
=CA=D4=CD=BC=D3=C3=D6=B8=D5=EB=B2=CE=CA=FD=C9=EA=C7=EB=B6=AF=CC=AC=C4=DA=B4=
=E6<BR><BR>=A1=A1=A1=A1=C3=AB=B2=A1=B3=F6=D4=DA=BA=AF=CA=FDGetMemory=D6=D0=
=A1=A3=B1=E0=D2=EB=C6=F7=D7=DC=CA=C7=D2=AA=CE=AA=BA=AF=CA=FD=B5=C4=C3=BF=B8=
=F6=B2=CE=CA=FD=D6=C6=D7=F7=C1=D9=CA=B1=B8=B1=B1=BE=A3=AC=D6=B8=D5=EB=B2=CE=
=CA=FDp=B5=C4=B8=B1=B1=BE=CA=C7 _p=A3=AC=B1=E0=D2=EB=C6=F7=CA=B9=20
_p =3D=20
p=A1=A3=C8=E7=B9=FB=BA=AF=CA=FD=CC=E5=C4=DA=B5=C4=B3=CC=D0=F2=D0=DE=B8=C4=
=C1=CB_p=B5=C4=C4=DA=C8=DD=A3=AC=BE=CD=B5=BC=D6=C2=B2=CE=CA=FDp=B5=C4=C4=DA=
=C8=DD=D7=F7=CF=E0=D3=A6=B5=C4=D0=DE=B8=C4=A1=A3=D5=E2=BE=CD=CA=C7=D6=B8=D5=
=EB=BF=C9=D2=D4=D3=C3=D7=F7=CA=E4=B3=F6=B2=CE=CA=FD=B5=C4=D4=AD=D2=F2=A1=A3=
=D4=DA=B1=BE=C0=FD=D6=D0=A3=AC_p=C9=EA=C7=EB=C1=CB=D0=C2=B5=C4=C4=DA=B4=E6=
=A3=AC=D6=BB=CA=C7=B0=D1_p=CB=F9=D6=B8=B5=C4=C4=DA=B4=E6=B5=D8=D6=B7=B8=C4=
=B1=E4=C1=CB=A3=AC=B5=AB=CA=C7p=CB=BF=BA=C1=CE=B4=B1=E4=A1=A3=CB=F9=D2=D4=
=BA=AF=CA=FDGetMemory=B2=A2=B2=BB=C4=DC=CA=E4=B3=F6=C8=CE=BA=CE=B6=AB=CE=F7=
=A1=A3=CA=C2=CA=B5=C9=CF=A3=AC=C3=BF=D6=B4=D0=D0=D2=BB=B4=CEGetMemory=BE=CD=
=BB=E1=D0=B9=C2=B6=D2=BB=BF=E9=C4=DA=B4=E6=A3=AC=D2=F2=CE=AA=C3=BB=D3=D0=D3=
=C3free=CA=CD=B7=C5=C4=DA=B4=E6=A1=A3<BR><BR>=A1=A1=A1=A1=C8=E7=B9=FB=B7=C7=
=B5=C3=D2=AA=D3=C3=D6=B8=D5=EB=B2=CE=CA=FD=C8=A5=C9=EA=C7=EB=C4=DA=B4=E6=A3=
=AC=C4=C7=C3=B4=D3=A6=B8=C3=B8=C4=D3=C3=A1=B0=D6=B8=CF=F2=D6=B8=D5=EB=B5=C4=
=D6=B8=D5=EB=A1=B1=A3=AC=BC=FB=CA=BE=C0=FD4.2=A1=A3<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
<TBODY>
<TR>
<TD>void GetMemory2(char **p, int num)<BR>{<BR>=A1=A1*p =3D (char=20
*)malloc(sizeof(char) * num);<BR>}<BR>void =
Test2(void)<BR>{<BR>=A1=A1char *str=20
=3D NULL;<BR>=A1=A1GetMemory2(&str, 100); // =
=D7=A2=D2=E2=B2=CE=CA=FD=CA=C7=20
&str=A3=AC=B6=F8=B2=BB=CA=C7str<BR>=A1=A1strcpy(str, "hello"); =
<BR>=A1=A1cout<< str <<=20
endl;<BR>=A1=A1free(str);=20
<BR>}</TD></TR></TBODY></TABLE>=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=A1=CA=BE=
=C0=FD4.2=D3=C3=D6=B8=CF=F2=D6=B8=D5=EB=B5=C4=D6=B8=D5=EB=C9=EA=C7=EB=B6=AF=
=CC=AC=C4=DA=B4=E6<BR><BR>=A1=A1=A1=A1=D3=C9=D3=DA=A1=B0=D6=B8=CF=F2=D6=B8=
=D5=EB=B5=C4=D6=B8=D5=EB=A1=B1=D5=E2=B8=F6=B8=C5=C4=EE=B2=BB=C8=DD=D2=D7=C0=
=ED=BD=E2=A3=AC=CE=D2=C3=C7=BF=C9=D2=D4=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=A1=A3=D5=E2=D6=D6=B7=BD=B7=A8=B8=
=FC=BC=D3=BC=F2=B5=A5=A3=AC=BC=FB=CA=BE=C0=FD4.3=A1=A3<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
<TBODY>
<TR>
<TD>char *GetMemory3(int num)<BR>{<BR>=A1=A1char *p =3D (char=20
*)malloc(sizeof(char) * num);<BR>=A1=A1return p;<BR>}<BR>void=20
Test3(void)<BR>{<BR>=A1=A1char *str =3D NULL;<BR>=A1=A1str =3D =
GetMemory3(100);=20
<BR>=A1=A1strcpy(str, "hello");<BR>=A1=A1cout<< str << =
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