`
java-mans
  • 浏览: 11341450 次
文章分类
社区版块
存档分类
最新评论

第15周报告3--学会ASCII文件的操作

 
阅读更多

第15周报告3
实验目的:学会ASCII文件的操作
实验内容:从文件中读入数据,排序并输出到另外一个文件中

* 程序头部注释开始
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称:<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br> * 作<wbr><wbr><wbr> 者:<wbr><wbr><wbr><wbr><wbr><wbr><wbr>雷恒鑫<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><br> * 完成日期:<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr>2011 年<wbr><wbr>12<wbr><wbr><wbr><wbr> 月<wbr><wbr>02<wbr><wbr><wbr><wbr><wbr> 日<br> * 版本号:<wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr><wbr> V1<br><br> * 对任务及求解方法的描述部分<br> * 输入描述:文件salary.txt<br> * 问题描述:从文件salary.txt中读入500名工人的工资,全部增加100元后进行排序(好事,涨工资了),将排序后的结果在屏幕上输出,并保存到文件ordered_salary.txt中<br> * 程序输出:ordered_salary.txt<br> * 程序头部的注释结束<br> //下面是程序<br> #include &lt;fstream&gt;<br> #include &lt;iostream&gt;<br> using namespace std;<br> void ordered_salary_txt(double a[],int num);<br> void ordered_salary(double a[],int num);<br> void ordered_salary_add(double a[],int num);<br> int main()<br> {<br><wbr>cout&lt;&lt;"500人的工资为:";<br><wbr>cout&lt;&lt;endl;<br><wbr><wbr><wbr> double a[500];<wbr><wbr><wbr><br><wbr>int i;<br><wbr>ifstream infile("salary.txt",ios::in);<br><wbr>if (!infile)<br><wbr>{<br><wbr><wbr>cerr&lt;&lt;"open error!"&lt;&lt;endl;<br><wbr><wbr>exit(1);<br><wbr>}<br><wbr>for (i=0;i&lt;500;i++)<br><wbr><wbr>infile&gt;&gt;a[i];<br><wbr>infile.close();<br><wbr>for(i=0;i&lt;500;i++)<br><wbr><wbr>cout&lt;&lt;a[i]&lt;&lt;"<wbr> ";<br><wbr>cout&lt;&lt;endl;<br><wbr>cout&lt;&lt;"500人加100元后的工资为:";<br><wbr><wbr><wbr> cout&lt;&lt;endl;<br><wbr><wbr><wbr> ordered_salary_add(a,500);<br><wbr>cout&lt;&lt;endl;<br><wbr><wbr><wbr> cout&lt;&lt;"500人排序后工资为:";<br><wbr><wbr><wbr> cout&lt;&lt;endl;<br><wbr><wbr><wbr> ordered_salary(a,500);<br><wbr><wbr><wbr> ordered_salary_txt( a,500);<br><wbr>cout&lt;&lt;endl;<br><wbr>return 0;<br> }<br> void ordered_salary_add(double a[],int num)<br> {<br><wbr>int i;<br><wbr>for (i=0;i&lt;500;i++)<br><wbr>{<br><wbr><wbr>a[i]=a[i]+100;<br><wbr><wbr>cout&lt;&lt;a[i]&lt;&lt;"<wbr> ";<br><wbr>}<br><wbr>return;<br> }<br> void ordered_salary(double a[],int num)<br> {<br><wbr><br><wbr>int i,j;<br><wbr>double t;<br><wbr>for(i=0;i&lt;500-1;i++)<br><wbr><wbr>for(j=0;j&lt;500-i-1;j++)<br><wbr><wbr><wbr>if(a[j]&gt;a[j+1])<br><wbr><wbr><wbr>{<br><wbr><wbr><wbr><wbr>t=a[j];<br><wbr><wbr><wbr><wbr>a[j]=a[j+1];<br><wbr><wbr><wbr><wbr>a[j+1]=t;<br><wbr><wbr><wbr>}<br><wbr><wbr><wbr><br><wbr>for (i=0;i&lt;500;i++)<br><wbr><wbr>{<br><wbr><wbr><wbr>cout&lt;&lt;a[i]&lt;&lt;"<wbr> ";<br><wbr><wbr>}<br><wbr><wbr>return;<br> }</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>


void ordered_salary_txt(double a[],int num)
{
<wbr>ofstream outfile("ordered_salary.txt",ios::out);<br><wbr>if(!outfile)<br><wbr>{<br><wbr><wbr>cerr&lt;&lt;"open error!"&lt;&lt;endl;<br><wbr><wbr>exit(1);<br><wbr>}<br><wbr>for(int i=0;i&lt;500;i++)<br><wbr><wbr>outfile&lt;&lt;a[i]&lt;&lt;"\n";<br><wbr>outfile.close();<br><wbr>return ;<br> }<br><br><br> 运行结果:查看下图ordered_salarry文件正确.<br><br> 经验积累:<br> 1.我学会了如何创建文件。</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

2.我学会了如何用文件保留数据。
3.

上机感言:
使用文件比看黑框框好多了

第15周报告3--学会ASCII文件的操作

分享到:
评论

相关推荐

Global site tag (gtag.js) - Google Analytics