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<span style="background-color: #CCFF99">第 1 章</span><span style="background-color: #CCFF99">
</span>><span style="background-color: #CCFF99"> 第 1 节 </span>><span style="background-color: #CCFF99">
1.5 习题</span></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">1.
C++<font FACE="??ì?,SimSun" LANG="ZH-CN">语言源程序由什么构成？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">2.
C++<font FACE="??ì?,SimSun" LANG="ZH-CN">语言中使用的标识符有哪些规定？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">3.
C++<font FACE="??ì?,SimSun" LANG="ZH-CN">语言中有哪几种常量？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">4.
C++<font FACE="??ì?,SimSun" LANG="ZH-CN">程序中注释的方式有哪两种？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">5.
<font FACE="??ì?,SimSun" LANG="ZH-CN">整型（</font>int<font FACE="??ì?,SimSun" LANG="ZH-CN">）数据、长整型（</font>long<font FACE="??ì?,SimSun" LANG="ZH-CN">）数据、无符号整型（</font>unsigned<font FACE="??ì?,SimSun" LANG="ZH-CN">）数据在内存中占用的字节数和数值范围是多少？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">6.
<font FACE="??ì?,SimSun" LANG="ZH-CN">单、双精度类型的有效数字位是多少？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">7.
<font FACE="??ì?,SimSun" LANG="ZH-CN">字符常量</font>'A'<font FACE="??ì?,SimSun" LANG="ZH-CN">和字符串常量</font>"A"<font FACE="??ì?,SimSun" LANG="ZH-CN">在内存中存放有何区别？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">8.
<font FACE="??ì?,SimSun" LANG="ZH-CN">运算符的优先级和结合性指的是什么？</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">9.
<font FACE="??ì?,SimSun" LANG="ZH-CN">设整数</font>42865<font FACE="??ì?,SimSun" LANG="ZH-CN">，请定义一个整型变量和一个无符号整型变量存放此数，并以分别八进制、十进制、十六进制输出这两个变量，观察结果并解释。</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">10.
<font FACE="??ì?,SimSun" LANG="ZH-CN">请编程定义一个常量（两种方法）</font>PI<font FACE="??ì?,SimSun" LANG="ZH-CN">，表示圆周率，输入半径，求圆的周长和面积，要求周长输出时的宽度为</font>12<font FACE="??ì?,SimSun" LANG="ZH-CN">（左对齐），小数点后保留</font>2<font FACE="??ì?,SimSun" LANG="ZH-CN">位；面积输出时的宽度</font>15<font FACE="??ì?,SimSun" LANG="ZH-CN">（右对齐），小数点后保留</font>5<font FACE="??ì?,SimSun" LANG="ZH-CN">位。</font></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">11.
<font FACE="??ì?,SimSun" LANG="ZH-CN">请指出下面程序的运行结果。</font></font></p>
<blockquote>
<blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">#include
<iostream.h></font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">void
main( )</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{
int a=3, b=2, c=1;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">int
d,logic;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">d=a++;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout<<"a="<<a<<",d="<<d<<endl;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">d=++b;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout<<"b="<<b<<",d="<<d<<endl;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">b*=a+c;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout<<a<<","<<b<<","<<c<<endl;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">b=2;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">logic=a>b;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout<<"logic="<<logic<<endl;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">logic=(c<a)||(c<b);</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout<<"logic="<<logic<<endl;</font></p>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
</blockquote>
</blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">12.
<font FACE="??ì?,SimSun" LANG="ZH-CN">举例说明类型转换的两种形式。</font></font></p>
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