📄 invoiceprinter.h.html

📁 《Big C++ 》Third Edition电子书和代码全集-Part1

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	<title>invoiceprinter.h</title>
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<pre>  1  #ifndef INVOICEPRINTER_H
  2  #define INVOICEPRINTER_H
  3  
  4  #include &lt;string&gt;
  5  
  6  using namespace std;
  7  
  8  <font color='#0000cc'>/**
  9     Formats an invoice.
 10  */</font>
 11  class InvoicePrinter
 12  {
 13  public:
 14     <font color='#0000cc'>/**
 15        Prints the invoice header.
 16        @param s the header string
 17     */</font>
 18     virtual void print_header(string s) = 0;
 19     <font color='#0000cc'>/**
 20        Prints a string in the next table cell
 21        @param value the value to print
 22        @param pad_right true if the cell is padded on the right
 23        with spaces
 24     */</font>
 25     virtual void print_string(string value, bool pad_right) = 0;
 26     <font color='#0000cc'>/**
 27        Prints a number in the next table cell
 28        @param value the value to print
 29        @param precision the number of digits after the decimal point
 30     */</font>
 31     virtual void print_number(double value, int precision) = 0;
 32     <font color='#0000cc'>/**
 33        Prints the invoice footer.
 34        @param s the footer string
 35        @param total the total amount due
 36     */</font>
 37     virtual void print_footer(string s, double total) = 0;
 38  };
 39  
 40  #endif</pre>
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