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C 编程程序: 将十六进制转换成字符*
原标题:C Programming: Convert Hex Int to Char*
  • 时间:2012-05-26 22:27:24
  •  标签:
  • c
  • char
  • int

我的问题是,我会如何去 改变的东西,比如:

    int i = 0x11111111;

我尝试使用 Itoa () 函数, 但它给了我一个浮动点例外 。

最佳回答

itoa 是非标准。 走开 。

一种可能性是使用 sprintf 和六溴的正确格式说明,即 ex 并做:

char str[ BIG_ENOUGH + 1 ];
sprintf(str,"%x",value);

然而,计算 value 数组大小的问题。 您需要一些猜测和 < a href=" http://c- faq.com/stdio/sprintfsize. html" rel=“ noreferrer" > FAQ 12. 21 是一个很好的起点。

在任何基数 b 中代表数字所需的字符数可以用以下公式相近:

*log b (n+1)

如果需要的话,多加几句以持有 0x ,然后您的 BIG_ENOUGH 准备就绪。

问题回答
char buffer[20];

然后:

sprintf(buffer, "%x", i);

或者:

itoa(i, buffer, 16);

缓冲区的字符指针可以是 buffer 本身(但它是同源)或其他变量:

char *p = buffer;

使用 sprintf () 函数将整数转换为十六进制应该完成您的任务 。

以下是一个例子:

int i = 0x11111111;

char szHexPrintBuf[10];

int ret_code = 0;

ret_code = sprintf(szHexPrintBuf, "%x", i);

if(0 > ret_code)
{ 
   something-bad-happend();
}

Using the sprintf() function like this -- sprintf(charBuffer, "%x", i); -- I think will work very well.





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