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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_693</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_692.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_693</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_694.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 693</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">聽聽聽聽//聽Exit聽loop聽when聽item聽is聽found,聽perhaps聽as聽sentinel<br /><br />聽聽聽聽while聽(strcmp(item,聽list[index])聽>聽0)<br /><br />聽聽聽聽聽聽聽聽聽聽聽聽//聽Invariant聽(prior聽to聽test):<br />聽聽聽聽聽聽聽聽聽聽聽聽//聽聽聽聽聽item聽is聽not聽in聽list[0..index-1]<br /><br />聽聽聽聽聽聽聽聽index++;<br /><br />聽聽聽聽//聽Determine聽whether聽item聽was聽found聽prior聽to聽sentinel<br /><br />聽聽聽聽found聽=聽(index聽<聽length聽&&聽strcmp(item,聽list[index])聽==聽0);<br />}<br /><br />//******************************************************************<br /><br />void聽CheckInStudents(<br />聽聽聽聽聽聽聽/*聽in聽*/聽聽聽聽const聽String10聽student[],聽聽聽聽聽聽//聽List聽of聽students<br />聽聽聽聽聽聽聽/*聽in聽*/聽聽聽聽int聽聽聽聽聽聽聽聽聽聽聽聽length,聽聽聽聽聽聽聽聽聽//聽Length聽of聽list<br />聽聽聽聽聽聽聽/*聽inout聽*/聽Boolean聽聽聽聽聽聽聽聽isPresent[]聽)聽聽聽//聽Checkmark聽list<br /><br />//聽Inputs聽student聽names聽from聽standard聽input,<br />//聽marking聽students聽present<br /><br />//聽Precondition:<br />//聽聽聽聽聽length聽<=聽MAX_LENGTH<br />//聽聽&&聽student[0..length-1]聽are聽in聽ascending聽order<br />//聽聽&&聽isPresent[0..length-1]聽are聽assigned<br />//聽Postcondition:<br />//聽聽聽聽聽The聽user聽has聽been聽repeatedly聽prompted聽to聽enter聽student聽names<br />//聽聽&&聽For聽all聽i,聽where聽student[i]聽matches聽an聽input聽name,<br />//聽聽聽聽聽聽聽聽聽isPresent[i]聽==聽TRUE<br />//聽聽&&聽For聽all聽input聽names聽not聽found聽in聽the聽student聽array,<br />//聽聽聽聽聽an聽error聽message聽has聽been聽printed<br /><br />{<br />聽聽聽聽String10聽stuName;聽聽聽聽聽聽聽//聽Name聽of聽student聽who聽is聽checking聽in<br /><br />聽聽聽聽cout聽<<聽"Enter聽last聽name:聽";<br />聽聽聽聽cin.get(stuName,聽11);聽聽聽聽聽聽聽聽聽聽聽聽聽聽//聽At聽most聽10聽chars聽plus聽'\0'<br />聽聽聽聽cin.ignore(100,聽'\n');<br />聽聽聽聽while聽(strcmp(聽stuName,聽END_DATA)聽!=聽0)<br />{<br />聽聽聽聽聽聽聽聽聽聽聽聽//聽Invariant聽(prior聽to聽test):<br />聽聽聽聽聽聽聽聽聽聽聽聽//聽聽聽聽聽All聽students聽prior聽to聽current聽one<br />聽聽聽聽聽聽聽聽聽聽聽聽//聽聽聽聽聽have聽been聽checked聽in</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_692.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_693</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_694.html">next page ></a></td> </tr> </table> </body> </html>⌨️ 快捷键说明
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