C语言 十六进制与ascii码互转

C语言 十六进制与ascii码互转

功能：十六进制与ascii码互转

#include
#include
#include


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 len;
    len = strlen(name);
    for (int i = 0; i < len; i++)
    {
        /* code */
        put[i] = char_to_hex(name[i]);
    }
    for (int i = 0; i < len; i++)
    {
        /* code */
        printf("char_to_hex:0x%02x\n",put[i]);
    }
    
    for (int i = 0; i < len; i++)
    {
        /* code */
        data[i] = hex_to_char(put[i]);
    }
    //data[15] = '\0';
     printf("hex_to_char:%s\n",data);


    system("pause");
}