?? 01.html
字號:
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<title>Untitled Document</title>
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<table width="100%">
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<div align="right"><br>
<font face='宋體' size='2'><a name=linuxc1></a></font> </div>
</td>
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<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> <br>
</font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> <br>
isalnum（測試字符是否為英文或數字） </font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 相關函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> isalpha，isdigit，islower，isupper<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> #include<ctype.h><br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 定義函數 </font> </div>
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<td valign="top"> <font face='宋體' size='2'> int isalnum (int c)<br>
</font> </td>
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<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 函數說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 檢查參數c是否為英文字母或阿拉伯數字，在標準c中相當于使用“isalpha(c)
|| isdigit(c)”做測試。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 若參數c為字母或數字，則返回TRUE，否則返回NULL(0)。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 范例 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> /* 找出str 字符串中為英文字母或數字的字符*/<br>
#include < ctype.h><br>
main()<br>
{<br>
char str[]=”123c@#FDsP[e?”;<br>
int i;<br>
for (i=0;str[i]!=0;i++ )<br>
if ( isalnum(str[i])) printf(“%c is an alphanumeric character\n”,str[i]);<br>
}<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 執行 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 1 is an apphabetic character<br>
2 is an apphabetic character<br>
3 is an apphabetic character<br>
c is an apphabetic character<br>
F is an apphabetic character<br>
D is an apphabetic character<br>
s is an apphabetic character<br>
P is an apphabetic character<br>
e is an apphabetic character<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><br>
<font face='宋體' size='2'><a name=linuxc2></a></font> </div>
</td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> <br>
</font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> <br>
isalpha （測試字符是否為英文字母） </font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 相關函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> isalnum，islower，isupper<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> #include<ctype.h><br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 定義函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> int isalpha (int c)<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 函數說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 檢查參數c是否為英文字母，在標準c中相當于使用“isupper(c)||islower(c)”做測試。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 若參數c為英文字母，則返回TRUE，否則返回NULL(0)。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 范例 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> /* 找出str 字符串中為英文字母的字符*/<br>
#include <ctype.h><br>
main()<br>
{<br>
char str[]=”123c@#FDsP[e?”;<br>
int i;<br>
for (i=0;str[i]!=0;i++)<br>
if(isalpha(str[i])) printf(“%c is an alphanumeric character\n”,str[i]);<br>
}<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 執行 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> c is an apphabetic character<br>
F is an apphabetic character<br>
D is an apphabetic character<br>
s is an apphabetic character<br>
P is an apphabetic character<br>
e is an apphabetic character<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><br>
<font face='宋體' size='2'><a name=linuxc3></a></font> </div>
</td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> <br>
</font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> <br>
isascii（測試字符是否為ASCII 碼字符） </font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 相關函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> iscntrl<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> #include <ctype.h><br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 定義函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> int isascii(int c);<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 函數說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 檢查參數c是否為ASCII碼字符，也就是判斷c的范圍是否在0到127之間。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 若參數c為ASCII碼字符，則返回TRUE，否則返回NULL(0)。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 范例 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> /* 判斷int i是否具有對映的ASCII碼字符*/<br>
#include<ctype.h><br>
main()<br>
{<br>
int i;<br>
for(i=125;i<130;i++)<br>
if(isascii(i))<br>
printf("%d is an ascii character:%c\n",i,i);<br>
else<br>
printf("%d is not an ascii character\n",i);<br>
}<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 執行 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 125 is an ascii character:}<br>
126 is an ascii character:~<br>
127 is an ascii character:<br>
128 is not an ascii character<br>
129 is not an ascii character<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><br>
<font face='宋體' size='2'><a name=linuxc4></a></font> </div>
</td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> <br>
</font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> <br>
iscntrl（測試字符是否為ASCII 碼的控制字符） </font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 相關函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> isascii<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> #include <ctype.h><br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 定義函數 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> int iscntrl(int c)；<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 函數說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 檢查參數c是否為ASCII控制碼，也就是判斷c的范圍是否在0到30之間。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 若參數c為ASCII控制碼，則返回TRUE，否則返回NULL(0)。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
</td>
<td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數。<br>
</font> </td>
</tr>
<tr>
<td width="80" valign="top">
<div align="right"><br>
<font face='宋體' size='2'><a name=linuxc5></a></font> </div>
</td>
</tr>
<tr>
<td width="80" valign="top">
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