ASCII和16进制数相互转换
unsigned char name[15] = {"1234567890abcde"};
unsigned char name1[15] = {0x31,0x32,0x33,0x34,0x35,0x31,0x32,0x33,0x34,0x35,0x31,0x32,0x33,0x34,0x35};
unsigned char put[15];
unsigned char data[16];
//ascii转16进制
unsigned char char_to_hex(unsigned char char_num)
{
if ((char_num >= '0') &&(char_num <= '9'))
{
/* code */
char_num = 0x30+(char_num - '0');
}
else if ((char_num >= 'A') &&(char_num <= 'Z'))
{
/* code */
char_num = 0x41+(char_num - 'A');
}
else if ((char_num >= 'a') &&(char_num <= 'z'))
{
/* code */
char_num = 0x61+(char_num - 'a');
}
else
char_num = 0xff;
return char_num;
}
//16进制转ascii
unsigned char hex_to_char(unsigned char hex_num)
{
if ((hex_num>=0x30) && (hex_num<=0x39))
{
/* code */
hex_num = '0'+ hex_num - 0x30;
}
else if ((hex_num>=0x41) && (hex_num<=0x5A))
{
/* code */
hex_num = 'A' + (hex_num - 0x41);
}
else if ( (hex_num>=0x61) && (hex_num<=0x7A))
{
/* code */
hex_num = 'a' + (hex_num - 0x61);
}
else
hex_num = 0xff;
return hex_num;
}
void main()
{
int i;
int len;
len = strlen(name);
for (i = 0; i < len; i++)
{
/* code */
put[i] = char_to_hex(name[i]);
}
for (i = 0; i < len; i++)
{
/* code */
printf("char_to_hex:0x%02x\n",put[i]);
}
for (i = 0; i < len; i++)
{
/* code */
data[i] = hex_to_char(put[i]);
}
printf("hex_to_char:%s\n",data);
system("pause");
}