📄 经典c程序100例==41--50.htm
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tmp=0;<BR>for(i=1;i<=100;i++)<BR>tmp+=i;<BR>printf("The
sum is
%d\n",tmp);<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序46】</FONT><BR>题目：宏#define命令练习(1) <BR>1.程序分析：<BR>2.程序源代码：<BR>#include
"stdio.h"<BR>#define TRUE 1<BR>#define FALSE
0<BR>#define SQ(x) (x)*(x)<BR>void
main()<BR>{<BR>int num;<BR>int
again=1;<BR>printf("\40: Program will stop if
input value less than
50.\n");<BR>while(again)<BR>{<BR>printf("\40:Please
input
number==>");<BR>scanf("%d",&num);<BR>printf("\40:The
square for this number is %d
\n",SQ(num));<BR>if(num>=50)<BR> again=TRUE;<BR>else<BR> again=FALSE;<BR>}<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序47】</FONT><BR>题目：宏#define命令练习(2)<BR>1.程序分析： <BR>2.程序源代码：<BR>#include
"stdio.h"<BR>#define exchange(a,b) { \
/*宏定义中允许包含两道衣裳命令的情形，此时必须在最右边加上"\"*/<BR> int
t;\<BR> t=a;\<BR> a=b;\<BR> b=t;\<BR> }<BR>void
main(void)<BR>{<BR>int x=10;<BR>int
y=20;<BR>printf("x=%d;
y=%d\n",x,y);<BR>exchange(x,y);<BR>printf("x=%d;
y=%d\n",x,y);<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序48】</FONT><BR>题目：宏#define命令练习(3) <BR>1.程序分析：<BR>2.程序源代码：<BR>#define
LAG ><BR>#define SMA <<BR>#define EQ
==<BR>#include "stdio.h"<BR>void main()<BR>{ int
i=10;<BR>int j=20;<BR>if(i LAG j)<BR>printf("\40:
%d larger than %d \n",i,j);<BR>else if(i EQ
j)<BR>printf("\40: %d equal to %d
\n",i,j);<BR>else if(i SMA j)<BR>printf("\40:%d
smaller than %d \n",i,j);<BR>else<BR>printf("\40:
No such
value.\n");<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序49】</FONT><BR>题目：#if
#ifdef和#ifndef的综合应用。<BR>1. 程序分析：
<BR>2.程序源代码：<BR>#include "stdio.h"<BR>#define
MAX<BR>#define MAXIMUM(x,y)
(x>y)?x:y<BR>#define MINIMUM(x,y)
(x>y)?y:x<BR>void main()<BR>{ int
a=10,b=20;<BR>#ifdef MAX<BR>printf("\40: The
larger one is
%d\n",MAXIMUM(a,b));<BR>#else<BR>printf("\40: The
lower one is
%d\n",MINIMUM(a,b));<BR>#endif<BR>#ifndef
MIN<BR>printf("\40: The lower one is
%d\n",MINIMUM(a,b));<BR>#else<BR>printf("\40: The
larger one is
%d\n",MAXIMUM(a,b));<BR>#endif<BR>#undef
MAX<BR>#ifdef MAX<BR>printf("\40: The larger one
is %d\n",MAXIMUM(a,b));<BR>#else<BR>printf("\40:
The lower one is
%d\n",MINIMUM(a,b));<BR>#endif<BR>#define
MIN<BR>#ifndef MIN<BR>printf("\40: The lower one
is %d\n",MINIMUM(a,b));<BR>#else<BR>printf("\40:
The larger one is
%d\n",MAXIMUM(a,b));<BR>#endif<BR>}<BR>==============================================================<BR><FONT
color=#990000>【程序50】</FONT><BR>题目：#include
的应用练习 <BR>1.程序分析：<BR>2.程序源代码：<BR>test.h
文件如下：<BR>#define LAG ><BR>#define SMA
<<BR>#define EQ ==<BR>#include "test.h"
/*一个新文件50.c，包含test.h*/<BR>#include
"stdio.h"<BR>void main()<BR>{ int i=10;<BR>int
j=20;<BR>if(i LAG j)<BR>printf("\40: %d larger
than %d \n",i,j);<BR>else if(i EQ
j)<BR>printf("\40: %d equal to %d
\n",i,j);<BR>else if(i SMA j)<BR>printf("\40:%d
smaller than %d \n",i,j);<BR>else<BR>printf("\40:
No such value.\n");<BR>}</P>
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color=#ffffff><B>[</B>来源<B>]</B>: beck
<B>[</B>编辑<B>]</B>: <FONT color=#ffffff>beck
</FONT> <B>[</B>加入时间<B>]</B>:2002-8-11
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