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printf("please input rectangle element:\n");<br>
for(i=0;i<3;i++)<br>
for(j=0;j<3;j++)<br>
scanf("%f",&a[i][j]);<br>
for(i=0;i<3;i++)<br>
sum=sum+a[i][i];<br>
printf("duijiaoxian he is %6.2f",sum);<br>
}<br>
==============================================================<br>
<font color="#990000">【程序39】</font><br>
题目:有一个已经排好序的数组。现输入一个数,要求按原来的规律将它插入数组中。<br>
1. 程序分析:首先判断此数是否大于最后一个数,然后再考虑插入中间的数的情况,插入后<br>
此元素之后的数,依次后移一个位置。 <br>
2.程序源代码:<br>
main()<br>
{<br>
int a[11]={1,4,6,9,13,16,19,28,40,100};<br>
int temp1,temp2,number,end,i,j;<br>
printf("original array is:\n");<br>
for(i=0;i<10;i++)<br>
printf("%5d",a[i]);<br>
printf("\n");<br>
printf("insert a new number:");<br>
scanf("%d",&number);<br>
end=a[9];<br>
if(number>end)<br>
a[10]=number;<br>
else<br>
{for(i=0;i<10;i++)<br>
{ if(a[i]>number)<br>
{temp1=a[i];<br>
a[i]=number;<br>
for(j=i+1;j<11;j++)<br>
{temp2=a[j];<br>
a[j]=temp1;<br>
temp1=temp2;<br>
}<br>
break;<br>
}<br>
}<br>
}<br>
for(i=0;i<11;i++)<br>
printf("%6d",a[i]);<br>
}<br>
==============================================================<br>
<font color="#990000">【程序40】</font><br>
题目:将一个数组逆序输出。<br>
1.程序分析:用第一个与最后一个交换。<br>
2.程序源代码:<br>
#define N 5<br>
main()<br>
{ int a[N]={9,6,5,4,1},i,temp;<br>
printf("\n original array:\n");<br>
for(i=0;i<N;i++)<br>
printf("%4d",a[i]);<br>
for(i=0;i<N/2;i++)<br>
{temp=a[i];<br>
a[i]=a[N-i-1];<br>
a[N-i-1]=temp;<br>
}<br>
printf("\n sorted array:\n");<br>
for(i=0;i<N;i++)<br>
printf("%4d",a[i]);<br>
}</p>
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<li><font color=#0772B1>上篇文章</font>:<a href="list.asp?id=205">经典c程序100例==21--30</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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