📄 [文章]关于thinking in c++ 中函数指针的四个例子的解释.mht
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[=CE=C4=D5=C2]=B9=D8=D3=DAThinking In C++=20
=D6=D0=BA=AF=CA=FD=D6=B8=D5=EB=B5=C4=CB=C4=B8=F6=C0=FD=D7=D3=B5=C4=BD=E2=CA=
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<H3>knight</H3></CENTER><BR></TD></TR>
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<TD vAlign=3Dtop><SPAN class=3Dbold><SPAN=20
=
class=3Dsmalltxt>[=CE=C4=D5=C2]=B9=D8=D3=DAThinking In C++=20
=
=D6=D0=BA=AF=CA=FD=D6=B8=D5=EB=B5=C4=CB=C4=B8=F6=C0=FD=D7=D3=B5=C4=BD=E2=CA=
=CD<BR><BR></SPAN></SPAN><BR>=D5=E2=D6=D6=B1=ED=CA=BE=D4=DA=CE=D2=C3=C7=C6=
=BD=CA=B1=B5=C4=D3=A6=D3=C3=D6=D0=B2=A2=B2=BB=B3=A3=D3=C3=A3=AC=B5=AB=B7=D6=
=CE=F6=CB=FC=BF=C9=D2=D4=C9=EE=C8=EB=C0=ED=BD=E2=BA=AF=CA=FD=D6=B8=D5=EB=A3=
=BA<BR>=B5=C8=BC=DB=D0=CE=CA=BD=BF=C9=D2=D4=D3=C3typedef=C0=B4=B1=ED=CA=BE=
=A1=A3<BR><BR><BR><BR>1:=20
void* (* (*fp1)(int) =
)[10];<BR><BR><BR><BR>=D4=DA <<=20
Thinking IN C++ ( Second Edition , Volume 1 ) =
>>=20
=D6=D0=B5=C4=D4=AD=CE=C4=C8=E7=CF=C2:<BR> =
fp1 is a pointer to a function=20
that takes an integer argument and returns a =
pointer to=20
an array of 10 void pointers.<BR> =20
=
=D2=E2=CB=BC=CA=C7=A3=BAfp1=CA=C7=D2=BB=B8=F6=D6=B8=CF=F2=BA=AF=CA=FD=D6=B8=
=D5=EB=A3=AC=B8=C3=BA=AF=CA=FD=BD=D3=CA=DC=D2=BB=B8=F6=D5=FB=D0=CE=B2=CE=CA=
=FD=A3=AC=B7=B5=BB=D8=D6=B5=D2=B2=CE=AA=D2=BB=B8=F6=D6=B8=D5=EB=A3=AC=D5=E2=
=B8=F6=D6=B8=D5=EB=D6=B8=CF=F2=B0=FC=BA=AC=CA=AE=B8=F6void*=B1=E4=C1=BF=B3=
=C9=D4=B1=B5=C4=CA=FD=D7=E9=A1=A3<BR> =20
=20
=
=B7=D6=CE=F6:=CA=D7=CF=C8=BF=B4=D6=D0=BC=E4(*fp1)(int)=B2=BF=B7=D6=A3=AC=BF=
=C9=D2=D4=D6=AA=B5=C0fp1=CA=C7=D2=BB=B8=F6=D6=B8=CF=F2=BA=AF=CA=FD=B5=C4=D6=
=B8=D5=EB=A3=AC=D5=E2=B8=F6=BA=AF=CA=FD=BD=D3=CA=DC=D2=BB=B8=F6=D5=FB=D0=CE=
=B2=CE=CA=FD=A3=AC=CF=C2=C3=E6=B7=D6=CE=F6=C6=E4=B7=B5=BB=D8=D6=B5=A3=BA=B7=
=B5=BB=D8=D6=B5=CA=D7=CF=C8=CA=C7=D2=BB=B8=F6=D6=B8=D5=EB=A3=AC=B8=C3=D6=B8=
=D5=EB=D6=B8=CF=F2=D2=BB=B8=F6=BA=AC=D3=D0void*=20
[10]=CA=FD=D7=E9=A1=A3<BR> =
=B5=C8=BC=DB=D3=DA=A3=BA<BR> =20
typedef void*=20
=
PVoid; //=BD=AB=D6=B8=CF=F2void*=B5=C4=D6=B8=D5=EB=B6=A8=D2=E5=
=CE=AAPVoid=C0=E0=D0=CD=A3=BB<BR> =20
=
typedef=20
PVoid PVoidA10[10];=20
=
//=BD=AB=BA=AC=D3=D010=B8=F6PVoid=D6=B8=D5=EB=B5=C4=CA=FD=D7=E9=B6=A8=D2=E5=
=CE=AAPVoidA10=A3=BB<BR> =20
typedef PVoidA10* =
=
(*fp1)(int); //=B6=A8=D2=E5fp1=C0=E0=D0=CD=A3=BB<BR><BR><BR><B=
R>2:float=20
=
(*(*fp2)(int,int,float))(int);<BR><BR><BR><BR>=D4=DA <<=20
Thinking IN C++ ( Second Edition , Volume 1 ) =
>>=20
=D6=D0=B5=C4=D4=AD=CE=C4=C8=E7=CF=C2:<BR> =
fp2 is a pointer to a function=20
that takes three arguments (int, int, and float) =
and=20
returns a pointer to a function that takes an =
integer=20
argument and returns a float.<BR> =20
=
=D2=E2=CB=BC=CA=C7=A3=BAfp2=CA=C7=D2=BB=B8=F6=D6=B8=CF=F2=BA=AF=CA=FD=B5=C4=
=D6=B8=D5=EB=A3=AC=B8=C3=BA=AF=CA=FD=BD=D3=CA=DC=C8=FD=B8=F6=B2=CE=CA=FD=B7=
=D6=B1=F0=CE=AA=20
=
=D5=FB=D0=CE=A3=AC=D5=FB=D0=CE=A3=AC=B8=A1=B5=E3=D0=CD=A3=AC=B7=B5=BB=D8=D6=
=B5=CE=AA=D2=BB=B8=F6=D6=B8=CF=F2=BA=AF=CA=FD=B5=C4=D6=B8=D5=EB=A3=AC=D5=E2=
=B8=F6=BA=AF=CA=FD=BD=D3=CA=DC=D2=BB=B8=F6=D5=FB=D0=CE=B2=CE=CA=FD=B7=B5=BB=
=D8=D2=BB=B8=F6=B8=A1=B5=E3=D0=CD=CA=FD=A3=BB<BR> =20
=
=B7=D6=CE=F6:=BA=CD1=B5=C4=B7=D6=CE=F6=CF=E0=CB=C6<BR> =
=B5=C8=BC=DB=D3=DA=A3=BA<BR> =20
=20
=
//=B6=A8=D2=E5=B7=B5=BB=D8=D6=B5=C0=E0=D0=CD=A3=A8=D6=B8=
=CF=F2=B2=CE=CA=FD=CE=AA=D5=FB=D0=CE=B7=B5=BB=D8=D6=B5=CE=AA=B8=A1=B5=E3=D0=
=CD=B5=C4=BA=AF=CA=FD=B5=C4=D6=B8=D5=EB<BR> =20
=
typedef=20
void* (*fp2r)(int);<BR> =
=20
typedef fp2r (*fp2)(int);=20
=
//=B6=A8=D2=E5fp2=C0=E0=D0=CD<BR><BR><BR><BR>3:typedef double=20
(*(*(*fp3)())[10])();<BR><BR><BR><BR>=D4=DA =
<< Thinking=20
IN C++ ( Second Edition , Volume 1 ) >>=20
=D6=D0=B5=C4=D4=AD=CE=C4=C8=E7=CF=C2:<BR> =
An fp3 is a pointer to a=20
function that takes no arguments and returns a =
pointer=20
to an array of 10 pointers to functions that =
take no=20
arguments and return doubles.<BR> =20
=
=D2=E2=CB=BC=C8=E7=CF=C2:fp3=CE=AA=D2=BB=B8=F6=D6=B8=CF=F2=BA=AF=CA=FD=B5=
=C4=D6=B8=D5=EB=A3=AC=B8=C3=BA=AF=CA=FD=B2=BB=BD=D3=CA=DC=B2=CE=CA=FD=A3=AC=
=B7=B5=BB=D8=D6=B5=CE=AA=D2=BB=B8=F6=D6=B8=CF=F2=CA=FD=D7=E9=B5=C4=D6=B8=D5=
=EB=A3=AC=B8=C3=CA=FD=D7=E9=BA=AC=D3=D010=B8=F6=B3=C9=D4=B1=A3=AC=B3=C9=D4=
=B1=C0=E0=D0=CD=CE=AA=D6=B8=CF=F2=BA=AF=CA=FD=B5=C4=D6=B8=D5=EB=A3=AC=D5=E2=
=B8=F6=BA=AF=CA=FD=D2=B2=B2=BB=BD=D3=CA=DC=B2=CE=CA=FD=A3=AC=B7=B5=BB=D8=D2=
=BB=B8=F6=CB=AB=BE=AB=B6=C8=B8=A1=B5=E3=CA=FD=A1=A3<BR><BR><BR><BR> =
=20
=
=D3=C3typedef=BD=ABfp3=B6=A8=D2=E5=CE=AA=D2=BB=B8=F6=C0=E0=D0=CD=A3=AC=C8=
=BB=BA=F3=D3=C3 fp3 a=20
=
=C9=F9=C3=F7=C1=CB=D2=BB=B8=F6=B8=C3=C0=E0=D0=CD=B5=C4=B1=E4=C1=BF=A1=A3<=
BR> =20
=
=B7=D6=CE=F6=A3=BA=CE=D2=C3=C7=CF=C8=B4=D3*fp3=BF=AA=CA=BC=BF=B4=A3=AC=CA=
=D7=CF=C8=B5=C3=B3=F6=BD=E1=C2=DB=CE=AAfp3=CE=AA=D2=BB=B8=F6=BA=AF=CA=FD=D6=
=B8=D5=EB=A3=AC=B8=C3=BA=AF=CA=FD=CE=DE=B2=CE=CA=FD=A3=AC=B7=B5=BB=D8=D2=BB=
=B8=F6=D6=B8=CF=F2=BA=AC=D3=D010=B8=F6=B3=C9=D4=B1=B5=C4=CA=FD=D7=E9=B5=C4=
=D6=B8=D5=EB=A3=AC=B5=AB=CA=FD=D7=E9=B5=C4=B3=C9=D4=B1=CA=C7=CA=B2=C3=B4=C0=
=E0=D0=CD=C4=D8=A3=BF=CE=D2=C3=C7=BD=D3=D7=C5=CF=F2=CF=C2=BF=B4=A3=BA=B3=C9=
=D4=B1=CA=C7=D6=B8=CF=F2=BA=AF=CA=FD=B5=C4=D6=B8=D5=EB=A3=AC=B8=C3=BA=AF=CA=
=FD=B2=BB=BD=D3=CA=DC=B2=CE=CA=FD=A3=AC=B7=B5=BB=D8=D2=BB=B8=F6=CB=AB=BE=AB=
=B6=C8=B5=C4=B8=A1=B5=E3=CA=FD=A1=A3<BR> =20
=BC=B4=A3=BA=CF=C8=D3=C9 =
(*fp3)()=BF=B4=B3=F6fp3=CE=AA=D2=BB=B8=F6=D6=B8=CF=F2=CE=DE=B2=CE=CA=FD=BA=
=AF=CA=FD=B5=C4=D6=B8=D5=EB=A3=BB<BR> =20
=D4=D9=D3=C9(* =
(*fp3)()=20
=
)[10]=BF=B4=B3=F6=B8=C3=BA=AF=CA=FD=B7=B5=BB=D8=D2=BB=B8=F6=D6=B8=D5=EB=A3=
=AC=D6=B8=CF=F2=BA=AC=D3=D010=B8=F6=B3=C9=D4=B1=B5=C4=CA=FD=D7=E9<BR>&nbs=
p; =20
=D7=EE=BA=F3=D3=C9double ()=20
=
=B5=C4=B3=F6=B3=C9=D4=B1=B5=C4=C0=E0=D0=CD=CE=AA=D6=B8=CF=F2=CE=DE=B2=CE=CA=
=FD=B7=B5=BB=D8double=D0=CD=B5=C4=BA=AF=CA=FD=B5=C4=D6=B8=D5=EB<BR><BR><B=
R><BR> =20
=B5=C8=BC=DB=D3=DA=A3=BA<BR> =
=20
typedef double=20
=
(*ArrayElem)(); //=B6=A8=D2=E5=CA=FD=D7=E9=B3=C9=D4=B1=C0=E0=D0=
=CD<BR> =20
=
typedef=20
ArrayElem ArrayElemArray[10]; =20
=
//=B6=A8=D2=E5=CA=FD=D7=E9=C0=E0=D0=CD<BR> =
=20
typedef ArrayElemArray*=20
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