📄 list2.htm
字号:
scanf("%d,%d",&a,&n);<br>
printf("a=%d,n=%d\n",a,n);<br>
while(count<=n)<br>
{<br>
tn=tn+a;<br>
sn=sn+tn;<br>
a=a*10;<br>
++count;<br>
}<br>
printf("a+aa+...=%ld\n",sn);<br>
}<br>
==============================================================<br>
<font color="#990000">【程序19】</font><br>
题目：一个数如果恰好等于它的因子之和，这个数就称为“完数”。例如6=1＋2＋3.编程<br>
找出1000以内的所有完数。<br>
1. 程序分析：请参照程序<--上页程序14. <br>
2.程序源代码：<br>
main()<br>
{<br>
static int k[10];<br>
int i,j,n,s;<br>
for(j=2;j<1000;j++)<br>
{<br>
n=-1;<br>
s=j;<br>
for(i=1;i<j;i++)<br>
{<br>
if((j%i)==0)<br>
{ n++;<br>
s=s-i;<br>
k[n]=i;<br>
}<br>
}<br>
if(s==0)<br>
{<br>
printf("%d is a wanshu",j);<br>
for(i=0;i<n;i++)<br>
printf("%d,",k[i]);<br>
printf("%d\n",k[n]);<br>
}<br>
}<br>
}<br>
============================================================== <br>
<font color="#990000">【程序20】</font><br>
题目：一球从100米高度自由落下，每次落地后反跳回原高度的一半；再落下，求它在<br>
第10次落地时，共经过多少米？第10次反弹多高？<br>
1.程序分析：见下面注释<br>
2.程序源代码：<br>
main()<br>
{<br>
float sn=100.0,hn=sn/2;<br>
int n;<br>
for(n=2;n<=10;n++)<br>
{<br>
sn=sn+2*hn;/*第n次落地时共经过的米数*/<br>
hn=hn/2; /*第n次反跳高度*/<br>
}<br>
printf("the total of road is %f\n",sn);<br>
printf("the tenth is %f meter\n",hn);<br>
}</p>
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<TD id=notice vAlign=center align=left colSpan=2 height=25> <font color="#ffffff"><b>[</b>来源<b>]</b>:
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<li><font color=#0772B1>上篇文章</font>：<a href="list.asp?id=203">经典c程序100例==1--10</a>
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经典c程序100例==91--100
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<td width="87%" align=center> 辽宁省铁岭师专c语言研究中心 <u>杨志锋</u> 数学系 <u>杜博</u> </td>
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