函数：引用file类对象及io类对象作为参数打印文本及显示文本-白红宇

函数：引用file类对象及io类对象作为参数打印文本及显示文本

阅读量：4661 次

发布时间：2019-06-09

本文共 1114 字，大约阅读时间需要 3 分钟。

#include 
    
     #include 
     
      #include 
      
       using namespace std;void file_it(ostream & os, double fo, const double fe[], int n);const int LIMIT = 5;int main(void){	ofstream fout;	const char * fn = "ep-data.txt";	fout.open(fn);	if(!fout.is_open())	{		cout << "Can't open " << fn << ". Bye.\n";		exit(EXIT_FAILURE);	}		double objective;	cout << "Enter the focal length of your "	        "telescope objective in mm: ";	cin >> objective;	double eps[LIMIT];	cout << "Enter the focal length, in mm, of " << LIMIT	     << " eyepieces:\n";	for(int i=0; i
       
        > eps[i];	}	file_it(fout, objective, eps, LIMIT);	file_it(cout, objective, eps, LIMIT);	cout << "Done\n";	return 0;}void file_it(ostream & os, double fo, const double fe[], int n){	ios_base::fmtflags initial;	initial = os.setf(ios_base::fixed);	os.precision(0);		os << "Focal length of objective: " << fo << " mm\n";	os.setf(ios::showpoint);	os.precision(1);	os.width(12);	os << "f.1. eyepiece";	os.width(15);	os << "magnification" << endl;		for(int i=0; i

转载于:https://www.cnblogs.com/WALLACE-S-BOOK/p/9732345.html

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