文件输入输出的 作业问题求教
题目是写一段有数个方程的代码，要求能够逐个读取data.txt文档的信息，加以计算之后将结果输出到average.txt文档，并且用setw( )将结果格式化并加上heading.<font color="#e6e6dd"> <br></font><p>data.txt的文档格式：<br>10001111 Fiong Charles 68 67 49 78 89<br>10003333 Wong Benny 88 90 91 93 99<font color="#e6e6dd"> <a href="http://www.6park.com/" target="_blank" ><br></a></font></p><p>我写了一段代码，可是不知道为什么average文件里面的数据都是0和空格（如：0 0000000）<br>#include<iostream><br>#include<fstream><br>char name1,name2;<br>long POF;<br>int no;<br>double mark1,mark2,mark3,mark4,mark5,average;<br>void read(int no,char name1,char name2,double mark1,double mark2,double mark3,double mark4,double mark5);<br>double cal(double mark1,double mark2,double mark3,double mark4,double mark5,double average);<br>long pof(double average,long POF);<br>void out(int no,char name1,char name2,double mark1,double mark2,double mark3,double mark4,double mark5,double average,long POF);<br>using namespace std;<br>int main ()<br>{<br> read(no,name1,name2,mark1,mark2,mark3,mark4,mark5);<br> cal(mark1,mark2,mark3,mark4,mark5,average);<br> pof(average,POF);<br> out(no,name1,name2,mark1,mark2,mark3,mark4,mark5,average,POF);</fstream></iostream></p>return 0;<br>}<br>void read(int no,char name1,char name2,double mark1,double mark2,double mark3,double mark4,double mark5)<br>{<br> ifstream inStream;<br> inStream.open("data.txt");<br> inStream>>no>>name1>>name2>>mark1>>mark2>>mark3>>mark4>>mark5;<br> inStream.close();<br>}<br>double cal(double mark1,double mark2,double mark3,double mark4,double mark5,double average)<br>{<br> cout.setf(ios::fixed);<br> cout.setf(ios::showpoint);<br> cout.precision(2);<br> average=(mark1+mark2+mark3+mark4+mark5)/5;<br> return (average);<br>}<br>long pof(double average,long POF)<br>{<br> if (average>=50)<br> POF='Pass';<br> else if (average<50)<br>POF='Fail'; <br> return (POF);<br>}<br>void out(int no,char name1,char name2,double mark1,double mark2,double mark3,double mark4,double mark5,double average,long POF)<br>{<br> ofstream outStream;<br> outStream.open("average.txt");<br> outStream<<no<<name1<<name2<<mark1<<mark2<<mark3<<mark4<<mark5<<average<<POF<<endl;<br> outStream.close();<br>}<br><br>
[align=right][color=#000066][此贴子已经被作者于2007-11-18 13:26:44编辑过][/color][/align]
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