C语言 hexdump

打印效果如图所示

#include <stdio.h>
#include <ctype.h> // isprint

void hexDump(const unsigned char *data, int size)
{
    int i, offset;
    for (offset = 0; offset < size; offset += 16)
    {
        // 打印地址
        printf("%04x  ", offset);
        // 打印中间十六进制数据
        for (i = 0; i < 16; i++)
        {
            if (i % 8 == 0)
            {
                putchar(' ');
            }

            if (offset + i < size)
            {
                printf("%02x ", data[offset + i]);
            }
            else
            {
                printf("   ");
            }
        }
        printf("   ");
        // 打印可显示字符
        for (i = 0; i < 16 && offset + i < size; i++)
        {
            if (isprint(data[offset + i]))
            {
                printf("%c", data[offset + i]);
            }
            else
            {
                putchar('.');
            }
        }
        putchar('\n');
    }
}

int main()
{
    int i = 0;
    unsigned char tmp[0xff] = {0};
    for (i = 0; i < sizeof(tmp); i++)
    {
        tmp[i] = i;
    }
    hexDump(tmp, sizeof(tmp));
    return 0;
}