Objective-C如何把UTF-8字符串转换为十六进制数？用C语言函数也可以。 如何给一个C语言字符串转16进制数的函数？
\u201cC#\u201d\u5982\u4f55\u628a\u5b57\u7b26\u4e32\u8f6c\u5316\u4e3a\u5341\u516d\u8fdb\u5236\u7684ASCII\u7801\uff1f\u8f93\u5165\u4ee3\u7801\u3002
\u5341\u516d\u8fdb\u5236\u6279\u91cf\u8f6cASCII\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a
private void button1_Click(object sender,EventArgs e)
{
textBox2.Text= HexStringToASCII(textBox1.Text);
}/// /// \u5c06\u4e00\u6761\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3aASCII/// /// \u4e00\u6761\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32/// \u8fd4\u56de\u4e00\u6761ASCII\u7801public static string HexStringToASCII(string hexstring){byte[] bt = HexStringToBinary(hexstring);string lin = "";for (int i = 0; i < bt.Length; i++){lin = lin + bt[i] + " ";}
string[] ss = lin.Trim().Split(new char[] { ' ' });char[] c = new char[ss.Length];int a;for (int i = 0; i < c.Length; i++){a = Convert.ToInt32(ss[i]);c[i] = Convert.ToChar(a);}
string b = new string(c);return b;}
/**//// /// 16\u8fdb\u5236\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u6570\u7ec4/// /// \u5b57\u7b26\u4e32\u6bcf\u4e2a\u5b57\u8282\u4e4b\u95f4\u90fd\u5e94\u8be5\u6709\u7a7a\u683c\uff0c\u5927\u591a\u6570\u7684\u4e32\u53e3\u901a\u8baf\u8d44\u6599\u4e0a\u9762\u768416\u8fdb\u5236\u90fd\u662f\u5b57\u8282\u4e4b\u95f4\u90fd\u662f\u7528\u7a7a\u683c\u6765\u5206\u5272\u7684\u3002/// \u8fd4\u56de\u4e00\u4e2a\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32public static byte[] HexStringToBinary(string hexstring){
string[] tmpary = hexstring.Trim().Split(' ');byte[] buff = new byte[tmpary.Length];for (int i = 0; i < buff.Length; i++){buff[i] = Convert.ToByte(tmpary[i], 16);}return buff;}
\u6bd4\u5982\u8f93\u5165\uff1a41 42 25
\u5f97\u5230\u7ed3\u679c\uff1aAB%
\u591a\u9ebb\u70e6\u554a\uff01
\u770b\u597d\u4e86\uff1a
#include
int a;
char *str="1Af";
int main()
{
sscanf(str,"%x",&a);//%x\u4e3a\u8bfb\u516516\u8fdb\u5236\u6570\uff0c\u5927\u5c0f\u5199\u5747\u53ef\u3002sscanf\u662f\u4ecec\u5b57\u7b26\u4e32\u4e2d\u8bfb\u5165\u53d8\u91cf\u3002
printf("%i",a);
return 0;
}
{
int i=0, tmp, result=0;
for(i=0; i<strlen(ch); i++) /* 把字符一个一个转成16进制数 */
{
if((ch[i]>='0')&&(ch[i]<='9'))
tmp = ch[i]-'0';
else if((ch[i]>='A')&&(ch[i]<='F'))
tmp = ch[i]-'A'+10;
else if((ch[i]>='a')&&(ch[i]<='f'))
tmp = ch[i]-'a'+10;
else
return -1; /* 出错了 */
result = result*16+tmp; /* 转成16进制数后加起来 */
}
return result;
}
字符串转换为hex，我用的这个。
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