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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>page_993</title> <link rel="stylesheet" href="reset.css" type="text/css" media="all"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> </head> <body> <table summary="top nav" border="0" width="100%"> <tr> <td align="left" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_992.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_993</strong></td> <td align="right" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_994.html">next page ></a></td> </tr> <tr> <td align="left" colspan="3" style="background: #ffffff; padding: 20px;"> <table border="0" width="100%" cellpadding="0"><tr><td align="center"> <table border="0" cellpadding="2" cellspacing="0" width="100%"><tr><td align="left"></td> <td align="right"></td> </tr></table></td></tr><tr><td align="left"><p></p><table border="0" cellspacing="0" cellpadding="0" width="100%"><tr><td align="right"><font face="Times New Roman, Times, Serif" size="2" color="#FF0000">Page 993</font></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">class聽Date<br />{<br />public:<br />聽聽聽聽void聽Print()聽const;聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽//聽Output聽operation<br />聽聽聽聽void聽CopyFrom(聽/*聽in聽*/聽Date聽otherDate聽);聽聽//聽Deep聽copy聽operation<br />聽聽聽聽Date(聽/*聽in聽*/聽int聽聽聽聽聽聽聽聽聽聽initMo,聽聽聽聽聽聽聽聽//聽Constructor<br />聽聽聽聽聽聽聽聽聽聽/*聽in聽*/聽int聽聽聽聽聽聽聽聽聽聽initDay,<br />聽聽聽聽聽聽聽聽聽聽/*聽in聽*/聽int聽聽聽聽聽聽聽聽聽聽initYr,<br />聽聽聽聽聽聽聽聽聽聽/*聽in聽*/聽const聽char*聽聽msgStr聽);<br />聽聽聽聽Date(聽const聽Date&聽otherDate聽);聽聽聽聽聽聽聽聽聽聽聽聽聽//聽Copy-constructor<br />聽聽聽聽聽聽聽~Date();聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽//聽Destructor<br />private:<br />聽聽聽聽int聽聽聽mo;<br />聽聽聽聽int聽聽聽day;<br />聽聽聽聽int聽聽聽yr;<br />聽聽聽聽char*聽msg;<br />};</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">This class declaration includes function prototypes for all four of the member functions we said we are going to need: constructor, destructor, deep copy operation, and copy-constructor. Before proceeding, let's define more precisely the semantics of each member function by furnishing the function preconditions and postconditions. We have placed the complete specification of the </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">Date</font><font face="Times New Roman, Times, Serif" size="3"> class in its own figureFigure 17-10so that we can refer to it later.</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">FIGURE 17-10 Specification of the </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">Date</font><font face="Times New Roman, Times, Serif" size="3"> Class</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">//******************************************************************<br />//聽SPECIFICATION聽FILE聽(date.h)<br />//聽This聽file聽gives聽the聽specification聽of聽a聽Date聽abstract聽data<br />//聽type聽representing聽a聽date聽and聽an聽associated聽message<br />//******************************************************************<br /><br />class聽Date<br />{<br />public:<br />聽聽聽聽void聽Print()聽const;<br />聽聽聽聽聽聽聽聽//聽Postcondition:<br />聽聽聽聽聽聽聽聽//聽聽聽聽聽Date聽and聽message聽have聽been聽output聽in聽the聽form<br />聽聽聽聽聽聽聽聽//聽聽聽聽聽聽聽聽month聽day,聽year聽聽聽聽message<br />聽聽聽聽聽聽聽聽//聽聽聽聽聽where聽the聽name聽of聽the聽month聽is聽printed聽as聽a聽string<br /><br />聽聽聽聽void聽CopyFrom(聽/*聽in聽*/聽Date聽otherDate聽);<br />聽聽聽聽聽聽聽聽//聽Postcondition:<br />聽聽聽聽聽聽聽聽//聽聽聽聽聽This聽date聽is聽a聽copy聽of聽otherDate,聽including<br />聽聽聽聽聽聽聽聽//聽聽聽聽聽the聽message聽string</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table></td></tr></table><p><font size="0"></font></p>聽 </td> </tr> <tr> <td align="left" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_992.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_993</strong></td> <td align="right" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_994.html">next page ></a></td> </tr> </table> </body> </html>⌨️ 快捷键说明
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