处理argv字符时用到的函数

冷不防 2022-12-20 08:50 117阅读 0赞

# 处理argv字符时用到的函数 #

包含C 标准库  \#include <stdlib.h>

<table> 
 <tbody> 
  <tr> 
   <th>序号</th> 
   <th>函数 &amp; 描述</th> 
  </tr> 
  <tr> 
   <td>1</td> 
   <td><a href="https://www.runoob.com/cprogramming/c-function-atof.html" rel="nofollow">double atof(const char *str)</a><br> 把参数&nbsp;<em>str</em>&nbsp;所指向的字符串转换为一个浮点数（类型为 double 型）。</td> 
  </tr> 
  <tr> 
   <td>2</td> 
   <td><a href="https://www.runoob.com/cprogramming/c-function-atoi.html" rel="nofollow">int atoi(const char *str)</a><br> 把参数&nbsp;<em>str</em>&nbsp;所指向的字符串转换为一个整数（类型为 int 型）。</td> 
  </tr> 
  <tr> 
   <td>3</td> 
   <td><a href="https://www.runoob.com/cprogramming/c-function-atol.html" rel="nofollow">long int atol(const char *str)</a><br> 把参数&nbsp;<em>str</em>&nbsp;所指向的字符串转换为一个长整数（类型为 long int 型）。</td> 
  </tr> 
  <tr> 
   <td>4</td> 
   <td><a href="https://www.runoob.com/cprogramming/c-function-strtod.html" rel="nofollow">double strtod(const char *str, char **endptr)</a><br> 把参数&nbsp;<em>str</em>&nbsp;所指向的字符串转换为一个浮点数（类型为 double 型）。</td> 
  </tr> 
  <tr> 
   <td>5</td> 
   <td><a href="https://www.runoob.com/cprogramming/c-function-strtol.html" rel="nofollow">long int strtol(const char *str, char **endptr, int base)</a><br> 把参数&nbsp;<em>str</em>&nbsp;所指向的字符串转换为一个长整数（类型为 long int 型）。</td> 
  </tr> 
  <tr> 
   <td>6</td> 
   <td><a href="https://www.runoob.com/cprogramming/c-function-strtoul.html" rel="nofollow">unsigned long int strtoul(const char *str, char **endptr, int base)</a><br> 把参数&nbsp;<em>str</em>&nbsp;所指向的字符串转换为一个无符号长整数（类型为 unsigned long int 型）。</td> 
  </tr> 
 </tbody> 
</table>