subject_50531.htm

一些关于vc的问答

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序号：50531 发表者：goldenfaith 发表日期：2003-08-22 10:11:12
<br>主题：关于atoi
<br>内容：请问atoi怎么用的啊，msdn没看懂，特别是第3个参数<BR>radix<BR>Base of value; must be in the range 2 to 36<BR>哪位能写个简单例子吗，tks<BR>
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回复者：夏天和小凡 回复日期：2003-08-22 10:17:41
<br>内容：很简单啊，字符串转为整数，只有一个参数，怎么跑也来三个呢，你说的不会是_itoa()吧!<BR><BR>
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<font color=red>答案被接受</font><br>回复者：风之文章 回复日期：2003-08-22 10:25:35
<br>内容：atoi好像只有一个参数吧！<BR>你问的是itoa吧！<BR><BR>第3个参数，代表进制。（范围为2-36）<BR><BR>#include &lt;stdlib.h&gt;<BR>#include &lt;stdio.h&gt;<BR><BR>void main( void )<BR>{<BR>&nbsp;&nbsp; char buffer[20];<BR>&nbsp;&nbsp; int&nbsp;&nbsp;i = 3445;<BR>&nbsp;&nbsp; long l = -344115L;<BR>&nbsp;&nbsp; unsigned long ul = 1234567890UL;<BR><BR>&nbsp;&nbsp; _itoa( i, buffer, 10 );<BR>&nbsp;&nbsp; printf( "String of integer %d (radix 10): %s\n", i, buffer );<BR>&nbsp;&nbsp; _itoa( i, buffer, 16 );<BR>&nbsp;&nbsp; printf( "String of integer %d (radix 16): 0x%s\n", i, buffer );<BR>&nbsp;&nbsp; _itoa( i, buffer, 2&nbsp;&nbsp;);<BR>&nbsp;&nbsp; printf( "String of integer %d (radix 2): %s\n", i, buffer );<BR><BR>&nbsp;&nbsp; _ltoa( l, buffer, 16 );<BR>&nbsp;&nbsp; printf( "String of long int %ld (radix 16): 0x%s\n", l, <BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;buffer );<BR><BR>&nbsp;&nbsp; _ultoa( ul, buffer, 16 );<BR>&nbsp;&nbsp; printf( "String of unsigned long %lu (radix 16): 0x%s\n", ul,<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;buffer );<BR>}<BR><BR><BR>Output<BR><BR>String of integer 3445 (radix 10): 3445<BR>String of integer 3445 (radix 16): 0xd75<BR>String of integer 3445 (radix 2): 110101110101<BR>String of long int -344115 (radix 16): 0xfffabfcd<BR>String of unsigned long 1234567890 (radix 16): 0x499602d2<BR><BR><BR>
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回复者：夏天和小凡 回复日期：2003-08-22 10:25:40
<br>内容：#include "stdlib.h"<BR>#include "stdio.h"<BR><BR>int main(int argc, char* argv[])<BR>{<BR>&nbsp;&nbsp;&nbsp;&nbsp;char buff[20];<BR>&nbsp;&nbsp;&nbsp;&nbsp;int i = 33333;<BR>&nbsp;&nbsp;&nbsp;&nbsp;_itoa(i,buff,10);<BR>&nbsp;&nbsp;&nbsp;&nbsp;printf("%s\n",buff);<BR>&nbsp;&nbsp;&nbsp;&nbsp;return 0;<BR>}<BR><BR>char *_itoa( int value, char *string, int radix );<BR>radix：<BR>2就是表示2进制<BR>10就是表示10进制<BR>你可以试试别的。。。。。。。<BR><BR>
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回复者：ax 回复日期：2003-08-22 10:28:55
<br>内容：atoi 只有一个参数啊，你是什么版本的msdn?
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回复者：goldenfaith 回复日期：2003-08-22 10:44:54
<br>内容：是itoa，写错了~<BR>懂了，多谢各位<BR>
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