字串轉數字簡單代碼實現，字串數字代碼

字串轉數字簡單代碼實現，字串數字代碼

#include <stdio.h>#define u8 unsigned charstatic const int MAC_LENGTH = 6;static u8 char1Tonum(u8 ch){    if((ch>='0')&&(ch<='9'))        return ch - '0';    else if ((ch>='a')&&(ch<='f'))        return ch - 'a' + 10;    else if ((ch>='A')&&(ch<='F'))        return ch - 'A' + 10;    else     return 0xff;}//簡單的把字串轉為數字 (比如把MAC地址轉為6個數字)static u8 char2Tonum(u8 hch, u8 lch){    return ((char1Tonum(hch) << 4) | char1Tonum(lch));}static void charToArray(u8* array,u8* stringBuf){    for(int i =0,j=0;i<MAC_LENGTH;i++,j+=2)    {        array[i] = char2Tonum(stringBuf[j],stringBuf[j+1]);        printf("0x%x\n",array[i]);    }}int main(){    u8 buf[MAC_LENGTH] = {0};    u8 bufMac[MAC_LENGTH*2+1] = "112233445566";    charToArray(buf,bufMac);/*    for(int i =0,j=0;i<MAC_LENGTH;i++,j+=2)    {        buf[i] = char2Tonum(bufMac[j],bufMac[j+1]);        printf("0x%x\n",buf[i]);    }*/    return 0;}/* 何問起 hovertree.com */

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