📄 sxsy05_211.mht
字号:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，返=
回</span><span
lang=3DEN-US>6</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，输入</span><sp=
an
lang=3DEN-US>f [2,-2]</span><span style=3D'font-family:SimSun;mso-ascii-fon=
t-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，返=
回</span><span
lang=3DEN-US>4</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，</span></p>
<p class=3DMsoNormal style=3D'text-indent:74.3pt;line-height:125%;vertical-=
align:
middle'><span style=3D'font-family:SimSun;mso-ascii-font-family:"Times New =
Roman";
mso-hansi-font-family:"Times New Roman"'>输入</span><span
lang=3DEN-US>f[2,u]</span><span style=3D'font-family:SimSun;mso-ascii-font-=
family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，返=
回</span><span
lang=3DEN-US style=3D'font-size:12.0pt;line-height:125%'><!--[if gte vml 1]=
><v:shapetype
id=3D"_x0000_t75" coordsize=3D"21600,21600" o:spt=3D"75" o:preferrelative=
=3D"t"
path=3D"m@4@5l@4@11@9@11@9@5xe" filled=3D"f" stroked=3D"f">
<v:stroke joinstyle=3D"miter"/>
<v:formulas>
<v:f eqn=3D"if lineDrawn pixelLineWidth 0"/>
<v:f eqn=3D"sum @0 1 0"/>
<v:f eqn=3D"sum 0 0 @1"/>
<v:f eqn=3D"prod @2 1 2"/>
<v:f eqn=3D"prod @3 21600 pixelWidth"/>
<v:f eqn=3D"prod @3 21600 pixelHeight"/>
<v:f eqn=3D"sum @0 0 1"/>
<v:f eqn=3D"prod @6 1 2"/>
<v:f eqn=3D"prod @7 21600 pixelWidth"/>
<v:f eqn=3D"sum @8 21600 0"/>
<v:f eqn=3D"prod @7 21600 pixelHeight"/>
<v:f eqn=3D"sum @10 21600 0"/>
</v:formulas>
<v:path o:extrusionok=3D"f" gradientshapeok=3D"t" o:connecttype=3D"rect"/>
<o:lock v:ext=3D"edit" aspectratio=3D"t"/>
</v:shapetype><v:shape id=3D"_x0000_i1039" type=3D"#_x0000_t75" style=3D'wi=
dth:120.75pt;
height:15pt'>
<v:imagedata src=3D"sxsy05_22.files/image001.wmz" o:title=3D""/>
</v:shape><![endif]--><![if !vml]><img width=3D161 height=3D20
src=3D"sxsy05_22.files/image002.gif" v:shapes=3D"_x0000_i1039"><![endif]></=
span></p>
<p class=3DMsoNormal style=3D'text-indent:42.75pt;line-height:125%;vertical=
-align:
top'><span style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Rom=
an";
mso-hansi-font-family:"Times New Roman"'>（</span><span lang=3DEN-US>=
3</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>）定义</span><span lang=3DEN-US>g [y_]=
:=3DIf
[y>0, “ABC”<span class=3DGramE>,“</span>DEF”,=
220;XYZ”]</span></p>
<p class=3DMsoNormal style=3D'text-indent:27.0pt;line-height:125%;vertical-=
align:
top'><span lang=3DEN-US><span style=3D'mso-spacerun:yes'> </spa=
n><span
style=3D'mso-spacerun:yes'> </span><span
style=3D'mso-spacerun:yes'> </span></span><span style=3D'font-fa=
mily:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>输入</span><span
lang=3DEN-US>g[Z]</span><span style=3D'font-family:SimSun;mso-ascii-font-fa=
mily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，返=
回</span><span
lang=3DEN-US>XYZ<span style=3D'mso-spacerun:yes'> </span><span
style=3D'mso-spacerun:yes'> </span><span
style=3D'mso-spacerun:yes'> </span></span><span style=3D'font-fa=
mily:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>（无法判断</span><span
lang=3DEN-US>Z</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>是否</span><span
lang=3DEN-US>>0</span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>）</span><=
/p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt;line-height:125%;vertical=
-align:
top'><span lang=3DEN-US>2</span><span style=3D'font-family:SimSun;mso-ascii=
-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>、</span><=
span
lang=3DEN-US>Which</span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>语句=
结构</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt;line-height:125%;vertical=
-align:
top'><span lang=3DEN-US>Which</span><span style=3D'font-family:SimSun;mso-a=
scii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>语句=
的一般形式为：</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt;line-height:125%;vertical=
-align:
top'><span lang=3DEN-US>Which [</span><span style=3D'font-family:SimSun;mso=
-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>条件=
</span><span
lang=3DEN-US>1</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，表达式</=
span><span
lang=3DEN-US>1</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，条件</span><sp=
an
lang=3DEN-US>2</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，表达式</=
span><span
lang=3DEN-US>2</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，</span><span style=3D'font=
-family:
SimSun'>…，</span><span style=3D'font-family:SimSun;mso-ascii-f=
ont-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>条件=
</span><span
lang=3DEN-US>n</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，表达式</=
span><span
lang=3DEN-US>n]</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt;line-height:125%;vertical=
-align:
top'><span lang=3DEN-US>Which [</span><span style=3D'font-family:SimSun;mso=
-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>条件=
</span><span
lang=3DEN-US>1</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，表达式</=
span><span
lang=3DEN-US>1</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，条件</span><sp=
an
lang=3DEN-US>2</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，表达式</=
span><span
lang=3DEN-US>2</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，</span><span style=3D'font=
-family:
SimSun'>…，</span><span style=3D'font-family:SimSun;mso-ascii-f=
ont-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>条件=
</span><span
lang=3DEN-US>n</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，表达式</=
span><span
lang=3DEN-US>n</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>，</span><span lang=3DEN-US>=
True</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>，表达式</span><span lang=3DEN-U=
S>]</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt;line-height:125%;vertical=
-align:
top'><span style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Rom=
an";
mso-hansi-font-family:"Times New Roman"'>依次计算&#=
26465;件</span><span
class=3DSpellE><span lang=3DEN-US>i</span></span><span style=3D'font-family=
:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>，计算对应第一个Ĉ=
65;件为</span><span
lang=3DEN-US>True</span><span style=3D'font-family:SimSun;mso-ascii-font-fa=
mily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>的表=
达式的值，作为整个=
2467;构的值。如果所有੖=
5;件的值都为</span><span
lang=3DEN-US>False</span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，则=
第一种格式不做任何=
6816;算，在第二种格式ߑ=
3;，以表达式的值作为&=
#25972;个结构的值。</span></p>
<p class=3DMsoNormal style=3D'line-height:125%;vertical-align:top'><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>例</span><span lang=3DEN-US>5</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>：给出函数</span></p>
<p class=3DMsoNormal style=3D'line-height:125%;vertical-align:top'><span
lang=3DEN-US><span
style=3D'mso-spacerun:yes'> =
</span><!--[if gte vml 1]><v:shape id=3D"_x0000_i1025" type=3D"#_x0000_t75"
style=3D'width:123pt;height:75.75pt' o:ole=3D"">
<v:imagedata src=3D"sxsy05_22.files/image003.wmz" o:title=3D""/>
</v:shape><![endif]--><![if !vml]><img width=3D164 height=3D101
src=3D"sxsy05_22.files/image004.gif" v:shapes=3D"_x0000_i1025"><![endif]><!=
--[if gte mso 9]><xml>
<o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" ShapeID=3D"_x0000_i1025"
DrawAspect=3D"Content" ObjectID=3D"_1237579504">
</o:OLEObject>
</xml><![endif]--></span></p>
<p class=3DMsoNormal style=3D'line-height:125%;vertical-align:top'><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>的定义，并分别=
计算</span><span
lang=3DEN-US><!--[if gte vml 1]><v:shape id=3D"_x0000_i1026" type=3D"#_x000=
0_t75"
style=3D'width:32.25pt;height:15.75pt' o:ole=3D"">
<v:imagedata src=3D"sxsy05_22.files/image005.wmz" o:title=3D""/>
</v:shape><![endif]--><![if !vml]><img width=3D43 height=3D21
src=3D"sxsy05_22.files/image006.gif" v:shapes=3D"_x0000_i1026"><![endif]><!=
--[if gte mso 9]><xml>
<o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" ShapeID=3D"_x0000_i1026"
DrawAspect=3D"Content" ObjectID=3D"_1237579505">
</o:OLEObject>
</xml><![endif]--></span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，</span><=
span
lang=3DEN-US><!--[if gte vml 1]><v:shape id=3D"_x0000_i1027" type=3D"#_x000=
0_t75"
style=3D'width:24pt;height:15.75pt' o:ole=3D"">
<v:imagedata src=3D"sxsy05_22.files/image007.wmz" o:title=3D""/>
</v:shape><![endif]--><![if !vml]><img width=3D32 height=3D21
src=3D"sxsy05_22.files/image008.gif" v:shapes=3D"_x0000_i1027"><![endif]><!=
--[if gte mso 9]><xml>
<o:OLEObject Type=3D"Embed" ProgID=3D"Equation.3" ShapeID=3D"_x0000_i1027"
DrawAspect=3D"Content" ObjectID=3D"_1237579506">
</o:OLEObject>
</xml><![endif]--></span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，</span><=
span
lang=3DEN-US><!--[if gte vml 1]><v:shape id=3D"_x0000_i1028" type=3D"#_x000=
0_t75"
style=3D'width:26.25pt;height:15.75pt' o:ole=3D"">
<v:imagedata src=3D"sxsy05_22.files/image009.wmz" o:title=3D""/>
</v:shape><![endif]--><![if !vml]><img width=3D35 height=3D21
src=3D"sxsy05_22.files/image010.gif" v:shapes=3D"_x0000_i1028"><![endif]><!=
--[if gte mso 9]><xml>
<o:OLEObject Type=3D"Embed" ProgID=3D"Equation.DSMT4" ShapeID=3D"_x0000_i1=
028"
DrawAspect=3D"Content" ObjectID=3D"_1237579507">
</o:OLEObject>
</xml><![endif]--></span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>，</span><=
span
lang=3DEN-US><!--[if gte vml 1]><v:shape id=3D"_x0000_i1029" type=3D"#_x000=
0_t75"
style=3D'width:26.25pt;height:15.75pt' o:ole=3D"">
<v:imagedata src=3D"sxsy05_22.files/image011.wmz" o:title=3D""/>
</v:shape><![endif]--><![if !vml]><img width=3D35 height=3D21
src=3D"sxsy05_22.files/image012.gif" v:shapes=3D"_x0000_i1029"><![endif]><!=
--[if gte mso 9]><xml>
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