?? 踏入c++中的雷區(qū)——c++內存管理詳解4-開發(fā)頻道-c++-天極網.mht
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<DIV id=3Dcontitle>
<H1 =
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=C4=DA=B4=E6=B9=DC=C0=ED=CF=EA=BD=E2</H1></DIV>
<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 =
id=3DcontentAdv></SPAN></DIV>=A1=A1=A1=A1<B>8=A1=A2malloc/free=20
=B5=C4=CA=B9=D3=C3=D2=AA=B5=E3</B><BR><BR>=A1=A1=A1=A1=BA=AF=CA=FDmalloc=B5=
=C4=D4=AD=D0=CD=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>void * malloc(size_t=20
size);</TD></TR></TBODY></TABLE><BR>=A1=A1=A1=A1=D3=C3malloc=C9=EA=C7=EB=D2=
=BB=BF=E9=B3=A4=B6=C8=CE=AAlength=B5=C4=D5=FB=CA=FD=C0=E0=D0=CD=B5=C4=C4=DA=
=B4=E6=A3=AC=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>int *p =3D (int *) malloc(sizeof(int) *=20
length);</TD></TR></TBODY></TABLE><BR>=A1=A1=A1=A1=CE=D2=C3=C7=D3=A6=B5=B1=
=B0=D1=D7=A2=D2=E2=C1=A6=BC=AF=D6=D0=D4=DA=C1=BD=B8=F6=D2=AA=CB=D8=C9=CF=A3=
=BA=A1=B0=C0=E0=D0=CD=D7=AA=BB=BB=A1=B1=BA=CD=A1=B0sizeof=A1=B1=A1=A3<BR>=
<BR>=A1=A1=A1=A1*=20
malloc=B7=B5=BB=D8=D6=B5=B5=C4=C0=E0=D0=CD=CA=C7void =
*=A3=AC=CB=F9=D2=D4=D4=DA=B5=F7=D3=C3malloc=CA=B1=D2=AA=CF=D4=CA=BD=B5=D8=
=BD=F8=D0=D0=C0=E0=D0=CD=D7=AA=BB=BB=A3=AC=BD=ABvoid * =
=D7=AA=BB=BB=B3=C9=CB=F9=D0=E8=D2=AA=B5=C4=D6=B8=D5=EB=C0=E0=D0=CD=A1=A3<=
BR><BR>=A1=A1=A1=A1*=20
malloc=BA=AF=CA=FD=B1=BE=C9=ED=B2=A2=B2=BB=CA=B6=B1=F0=D2=AA=C9=EA=C7=EB=B5=
=C4=C4=DA=B4=E6=CA=C7=CA=B2=C3=B4=C0=E0=D0=CD=A3=AC=CB=FC=D6=BB=B9=D8=D0=C4=
=C4=DA=B4=E6=B5=C4=D7=DC=D7=D6=BD=DA=CA=FD=A1=A3=CE=D2=C3=C7=CD=A8=B3=A3=BC=
=C7=B2=BB=D7=A1int,=20
float=B5=C8=CA=FD=BE=DD=C0=E0=D0=CD=B5=C4=B1=E4=C1=BF=B5=C4=C8=B7=C7=D0=D7=
=D6=BD=DA=CA=FD=A1=A3=C0=FD=C8=E7int=B1=E4=C1=BF=D4=DA16=CE=BB=CF=B5=CD=B3=
=CF=C2=CA=C72=B8=F6=D7=D6=BD=DA=A3=AC=D4=DA32=CE=BB=CF=C2=CA=C74=B8=F6=D7=
=D6=BD=DA=A3=BB=B6=F8float=B1=E4=C1=BF=D4=DA16=CE=BB=CF=B5=CD=B3=CF=C2=CA=
=C74=B8=F6=D7=D6=BD=DA=A3=AC=D4=DA32=CE=BB=CF=C2=D2=B2=CA=C74=B8=F6=D7=D6=
=BD=DA=A1=A3=D7=EE=BA=C3=D3=C3=D2=D4=CF=C2=B3=CC=D0=F2=D7=F7=D2=BB=B4=CE=B2=
=E2=CA=D4=A3=BA=20
<BR><BR>
<TABLE borderColor=3D#cccccc width=3D"90%" align=3Dcenter =
bgColor=3D#e3e3e3 border=3D1>
<TBODY>
<TR>
<TD>cout << sizeof(char) << endl;<BR>cout << =
sizeof(int)=20
<< endl;<BR>cout << sizeof(unsigned int) <<=20
endl;<BR>cout << sizeof(long) << endl;<BR>cout =
<<=20
sizeof(unsigned long) << endl;<BR>cout << =
sizeof(float)=20
<< endl;<BR>cout << sizeof(double) << =
endl;<BR>cout=20
<< sizeof(void *) <<=20
endl;</TD></TR></TBODY></TABLE><BR>=A1=A1=A1=A1=D4=DAmalloc=B5=C4=A1=B0()=
=A1=B1=D6=D0=CA=B9=D3=C3sizeof=D4=CB=CB=E3=B7=FB=CA=C7=C1=BC=BA=C3=B5=C4=B7=
=E7=B8=F1=A3=AC=B5=AB=D2=AA=B5=B1=D0=C4=D3=D0=CA=B1=CE=D2=C3=C7=BB=E1=BB=E8=
=C1=CB=CD=B7=A3=AC=D0=B4=B3=F6=20
p =3D =
malloc(sizeof(p))=D5=E2=D1=F9=B5=C4=B3=CC=D0=F2=C0=B4=A1=A3<BR><BR>=A1=A1=
=A1=A1* =BA=AF=CA=FDfree=B5=C4=D4=AD=D0=CD=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>void free( void * memblock=20
);</TD></TR></TBODY></TABLE><BR>=A1=A1=A1=A1=CE=AA=CA=B2=C3=B4free=BA=AF=CA=
=FD=B2=BB=CF=F3malloc=BA=AF=CA=FD=C4=C7=D1=F9=B8=B4=D4=D3=C4=D8=A3=BF=D5=E2=
=CA=C7=D2=F2=CE=AA=D6=B8=D5=EBp=B5=C4=C0=E0=D0=CD=D2=D4=BC=B0=CB=FC=CB=F9=
=D6=B8=B5=C4=C4=DA=B4=E6=B5=C4=C8=DD=C1=BF=CA=C2=CF=C8=B6=BC=CA=C7=D6=AA=B5=
=C0=B5=C4=A3=AC=D3=EF=BE=E4free(p)=C4=DC=D5=FD=C8=B7=B5=D8=CA=CD=B7=C5=C4=
=DA=B4=E6=A1=A3=C8=E7=B9=FBp=CA=C7NULL=D6=B8=D5=EB=A3=AC=C4=C7=C3=B4free=B6=
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