十六进制数组和二进制字符串的相互转换

例如 { 0x23, 0x4A, 0x5E } <=> “001000110100101001011110”

/***十六进制数转换成二进制字符串***/
void HexToBinStr(unsigned char* hexStr, unsigned char* binStr, int lenHex)
{    
    memset(binStr, '0', lenHex * 8);    
    unsigned char hexChar[2];    
    for (int i = 0; i < lenHex; i++)    
{        
hexChar[0] = (hexStr[i] & 0xF0) >> 4;        
hexChar[1] = hexStr[i] & 0x0F;        
for (int j = 0; j < 2; j++)        
{           
 for (int k = 0; k < 4; k++)            
{               
 if (hexChar[j] & (0x08 >> k))                
{                    
binStr[8 * i + 4 * j + k] = '1';                
}            
}        
}    
}
}