浅析Hex和ascii之间如何转换
方法一：
- int Hex2Ascii(char* hex, char* ascii)
- {
- int len = strlen(hex), tlen, i, cnt;
- for (i = 0, cnt = 0, tlen = 0; i<len; i++)
- {
- char c = toupper(hex[i]);
- if ((c>=0&& c<=9) || (c>=A&& c<=F))
- {
- BYTE t = (c >= A) ? c - A + 10 : c - 0;
- if (cnt)
- ascii[tlen++] += t, cnt = 0;
- else
- ascii[tlen] = t << 4, cnt = 1;
- }
- }
- return tlen;
- }
方法二：
- int Ascii2Hex(char* ascii, char* hex)
- {
- int i, len = strlen(ascii);
- char chHex[] = "0123456789ABCDEF";
- for (i = 0; i<len; i++)
- {
- hex[i*3] = chHex[((BYTE)ascii[i]) >> 4];
- hex[i*3 +1] = chHex[((BYTE)ascii[i]) & 0xf];
- hex[i*3 +2] = ;
- }
- hex[len * 3] = ;
- return len * 3;
- }
- //! 发送数据
