unsigned char数组赋值

memset(send_buf, 0, SEND_BUFF_LEN);

const char * pStr = "this is test txt";
strcpy((char*)send_buf,pStr);

 

 

unsigned char数组 赋值与长度unsigned char数组 赋值与长度

unsigned char数组 赋值与长度unsigned char数组 赋值与长度unsigned char数组 赋值与长度

 

//重要的事情 说5遍

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unsigned char toByte(char c) {     unsigned char value = 0;       if (c >= '0' && c <= '9')         value = c - '0';     else if (c >= 'A' && c <= 'Z')         value = c - 'A' + 10;     else if (c >= 'a' && c <= 'z')         value = c - 'a' + 10;       return value; }   void hexStringToByte(unsigned char *dstByte,const char *srcHexString ,int len) {     int index;       for (int i = 0; i < len; i++){         index = i * 2;         dstByte[i] = ((toByte(srcHexString[index]))<<4) | toByte(srcHexString[index+1]);     } }

　　输入可以，如何计算长度？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？？