西安交大c++随堂练习

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1、西安交通大学实验报告一.实验目的（1）标准库、流概述（2）输入输出流的使用。（3）格式化I/O、文件处理二.实验内容1.按下面格式输出圆周率的值。33.13.143.1413.14153.141593.1415923.14159261.程序源代码#include#include#includeusingnamespacestd;intmain(){doublea=3.1415926;intplaces;for(places=1;places<=8;places++){doubleb=4.5/pow(10.

2、0,places);cout.precision(places);cout<#include#includeusingnamespacestd;intmain(){charch;intline=1;ifstreamin("01.cpp");if(!in){cout<<"不能读入文件";return1;}cout<

3、w(4)<#include#include#includeusingnamespacestd;intmain(){charch;

4、intn=1;ifstreamfin("11.txt");if(!fin){cout<<"打开失败"<

5、的个数:"<#include#include#includeusingnamespacestd;

6、classemployee{public:charnum[20];charname[10];charplace[10];intage;employee(){}employee(char*num,char*name,char*place,intAge){strcpy(this->name,name);strcpy(this->num,num);strcpy(this->place,place);age=Age;}voidshowme(){cout<

7、ployeeemp[6]={employee("001011","张三","北京",20),employee("001012","李四","上海",23),employee("001013","王丽","广州",21),employee("001014","王刚","陕西",18),employee("001015","Kimi","台湾",25),employee("001016","Cindy","陕西",20)};ofstreamfile1("file.dat");if(!file1){cout<<"打开失败"<

8、inti=0;i<6;i++)file1.write((char*