📄 nsy23.mht
字号:
si-font-family:
"Times New Roman"'>本实验介绍数学=
软件</span><span
class=3DSpellE><span lang=3DEN-US>Mathematica</span></span><span style=3D'f=
ont-family:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>的输入输出功能Ӎ=
0;</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;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"'>(一)基&#=
26412;输入输出</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;line-height:125%;vertical-=
align:
middle'><b style=3D'mso-bidi-font-weight:normal'><span style=3D'font-family=
:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>交互式输入命令</span><span
lang=3DEN-US>Input</span></b><b style=3D'mso-bidi-font-weight:normal'><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>和</span><span class=3DSpellE><span lang=3DEN-US>I=
nputString</span></span><span
lang=3DEN-US><o:p></o:p></span></b></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt;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"'>在</span><span class=3DSpell=
E><span
lang=3DEN-US>Mathematica</span></span><span style=3D'font-family:SimSun;mso=
-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>中,=
除了用符号“=”直ÿ=
09;给变量赋值以外,可=
以用</span><span
lang=3DEN-US>Input</span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>或</span><=
span
class=3DSpellE><span lang=3DEN-US>InputString</span></span><span style=3D'f=
ont-family:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>命令进行交互式௚=
0;输入。它们的使用格&=
#24335;如下:</span></p>
<p class=3DMsoNormal style=3D'text-indent:42.75pt;mso-char-indent-count:4.0=
7'><span
lang=3DEN-US>Input[ ] </span><span style=3D'font-family:SimSun;mso-ascii-fo=
nt-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>:</span><=
span
lang=3DEN-US><span
style=3D'mso-spacerun:yes'> =
</span></span><span style=3D'font-family:SimSun;mso-ascii-font-family:"Time=
s New Roman";
mso-hansi-font-family:"Times New Roman"'>读入一个&#=
36755;入的表达式;</span></p>
<p class=3DMsoNormal style=3D'text-indent:42.75pt;mso-char-indent-count:4.0=
7'><span
lang=3DEN-US>Input[“</span><span style=3D'font-family:SimSun;mso-asci=
i-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>提示=
内容</span><span
lang=3DEN-US>”] </span><span style=3D'font-family:SimSun;mso-ascii-fo=
nt-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>:</span><=
span
lang=3DEN-US><span style=3D'mso-spacerun:yes'> </sp=
an></span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>显示提示内容后=
,再读入表达式;</span></p>
<p class=3DMsoNormal style=3D'text-indent:42.75pt;mso-char-indent-count:4.0=
7'><span
class=3DSpellE><span lang=3DEN-US>InputString</span></span><span lang=3DEN-=
US>[ ] </span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>:</span><span lang=3DEN-US><span
style=3D'mso-spacerun:yes'> =
</span></span><span style=3D'font-family:SimSun;mso-ascii-font-family:"Time=
s New Roman";
mso-hansi-font-family:"Times New Roman"'>读入一个&#=
36755;入的字符串;</span></p>
<p class=3DMsoNormal style=3D'text-indent:42.75pt;mso-char-indent-count:4.0=
7'><span
class=3DSpellE><span lang=3DEN-US>InputString</span></span><span lang=3DEN-=
US>[“</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>提示内容</span><span lang=3DEN-U=
S>”]
</span><span style=3D'font-family:SimSun;mso-ascii-font-family:"Times New R=
oman";
mso-hansi-font-family:"Times New Roman"'>:显示提&#=
31034;内容后,再读入字Ļ=
26;串</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>例</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"'>:</span><span lang=3DEN-US>=
n=3D<span
class=3DGramE>Input[</span>“Please input a number”]</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>运行后,系统会弹Ñ=
86;一个对话框,此时,=
我们就可在对话框中=
6755;入内容。</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>例</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 lang=3DEN-US>=
<span
class=3DGramE>f</span> [x_]=3DInput[“Please give the Definition of fu=
nction
f(x)”]</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>我们在弹出的对话Ċ=
94;中输入一个函数的表=
达式就可以通过交互=
6041;式定义函数。</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>例</span><span
lang=3DEN-US>3</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>=
g=3D<span
class=3DSpellE><span class=3DGramE>InputString</span></span><span class=3DG=
ramE>[</span>
]</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>运行后系统弹出对Ŧ=
05;框,此时我们输入</span><=
span
lang=3DEN-US>The value of x is 2 </span><span style=3D'font-family:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>,则这句话就成为</spa=
n><span
lang=3DEN-US>g</span><span style=3D'font-family:SimSun;mso-ascii-font-famil=
y:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>的内容,&#=
20197;后需要时就可以使ī=
92;。</span></p>
<p class=3DMsoNormal><b style=3D'mso-bidi-font-weight:normal'><span lang=3D=
EN-US><span
style=3D'mso-spacerun:yes'> </span></span></b><b
style=3D'mso-bidi-font-weight:normal'><span style=3D'font-family:SimSun;mso=
-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>输出=
命令</span><span
lang=3DEN-US>Print</span></b><b style=3D'mso-bidi-font-weight:normal'><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>和</span><span class=3DSpellE><span lang=3DEN-US>S=
tylePrint</span></span><span
lang=3DEN-US><o:p></o:p></span></b></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt'><span style=3D'font-fami=
ly:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>通常情况下,如果ß=
12;</span><span
class=3DSpellE><span lang=3DEN-US>Mathematica</span></span><span style=3D'f=
ont-family:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>语句结尾不加分ࡥ=
5;,则</span><span
class=3DSpellE><span lang=3DEN-US>Mathematica</span></span><span style=3D'f=
ont-family:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>立即输出结果,ࣳ=
4;果加了分号,则不输&=
#20986;结果。为了方便在&=
656;要的时候可以输出结=
;果,</span><span
class=3DSpellE><span lang=3DEN-US>Mathematica</span></span><span style=3D'f=
ont-family:
SimSun;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times=
New Roman"'>提供了</span><span
lang=3DEN-US>Print</span><span style=3D'font-family:SimSun;mso-ascii-font-f=
amily:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>命令=
。</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt'><span lang=3DEN-US>Print=
</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>命令的格式如下=
:</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt'><span lang=3DEN-US>Print=
[</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-US>1</spa=
n><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>2</span><span
style=3D'font-family:SimSun;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>,</span><span style=3D'font-family:SimSun'>…=
;</span><span
lang=3DEN-US>]</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.75pt'><span style=3D'font-fami=
ly:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>该命令依次输出表ů=
98;式</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"'>的值,两表达式间Ç=
81;留空格,完成后换行=
。</span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>例</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><span lang=3DEN-US>
Print[1,2,3,4];Print[a] </span><span style=3D'font-family:SimSun;mso-ascii-=
font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>结果=
为:</span></p>
<p class=3DMsoNormal style=3D'text-indent:5.25pt'><span lang=3DEN-US><span
style=3D'mso-spacerun:yes'>
</span>1234</span></p>
<p class=3DMsoNormal><span lang=3DEN-US><span
style=3D'mso-spacerun:yes'> </span><span
style=3D'mso-spacerun:yes'> </span><span
style=3D'mso-spacerun:yes'> </spa=
n><span
class=3DGramE>a</span></span></p>
<p class=3DMsoNormal style=3D'text-indent:21.0pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>例</span><span
lang=3DEN-US>5</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;mso-ascii-font-family:"Times New Roman";mso-han=
si-font-family:
"Times New Roman"'>打印前三个正整=
数的立方值</span><span
lang=3DEN-US> Do[Print[<span class=3DSpellE>i</span>, “ ”,i^3],=
{i,3}]</span></p>
<p class=3DMsoNormal style=3D'text-indent:37.5pt'><span style=3D'font-famil=
y:SimSun;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Ro=
man"'>结果为:</span><span
lang=3DEN-US><span
style=3D'mso-spacerun:yes'>
</span>1<span style=3D'mso-spacerun:yes'> </span><span class=3D=
SpellE>1</span></span></p>
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