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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_1137</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_1136.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_1137</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_1138.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 1137</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="Times New Roman, Times, Serif" size="3"><i>Call 3:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head</font><font face="Times New Roman, Times, Serif" size="3"> points to the node containing 1066 and is not </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">NULL</font><font face="Times New Roman, Times, Serif" size="3">. Execution of this call pauses until the recursive call with the actual parameter </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head->link</font><font face="Times New Roman, Times, Serif" size="3"> has been completed.</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"><i>Call 4:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head</font><font face="Times New Roman, Times, Serif" size="3"> points to the node containing 1492 and is not </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">NULL</font><font face="Times New Roman, Times, Serif" size="3">. Execution of this call pauses until the recursive call with the actual parameter </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head->link</font><font face="Times New Roman, Times, Serif" size="3"> has been completed.</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"><i>Call 5:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head</font><font face="Times New Roman, Times, Serif" size="3"> is </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">NULL</font><font face="Times New Roman, Times, Serif" size="3">. Execution of this call is complete. Control returns to the preceding call.</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"><i>Call 4:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head->component</font><font face="Times New Roman, Times, Serif" size="3"> (which is 1492) is printed. Execution of this call is complete. Control returns to the preceding call.</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"><i>Call 3:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head->component</font><font face="Times New Roman, Times, Serif" size="3"> (which is 1066) is printed. Execution of this call is complete. Control returns to the preceding call.</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"><i>Call 2:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head->component</font><font face="Times New Roman, Times, Serif" size="3"> (which is 78) is printed. Execution of this call is complete. Control returns to the preceding call.</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"><i>Call 1:</i> </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">head->component</font><font face="Times New Roman, Times, Serif" size="3"> (which is 45) is printed. Execution of this call is complete. Because this is the nonrecursive call, execution continues with the statement immediately following </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">RevPrint(head)</font><font face="Times New Roman, Times, Serif" size="3">.</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 19-5 shows the execution of the </font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">RevPrint</font><font face="Times New Roman, Times, Serif" size="3"> function. The actual parameters are pointers (memory addresses), so we use </font><font face="Symbol" size="3">(r)</font><font face="Times New Roman, Times, Serif" size="3"> 45 to mean the pointer to the node whose component is 45.</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" width="100%"><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 align="center"><font face="Times New Roman, Times, Serif" size="3"><img src="2d1b2d0c77c636f95c7a96d64aeaee2a.gif" border="0" alt="1137-01.gif" width="405" height="320" /></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" width="100%"><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 align="center"><font face="Times New Roman, Times, Serif" size="2">Figure聽19-5<br />Execution聽of聽</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="3">RevPrint(head)</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_1136.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_1137</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_1138.html">next page ></a></td> </tr> </table> </body> </html>⌨️ 快捷键说明
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