程序代码：

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
int main(int argc,char* argv[])
{
    if(argc!=2)
    {
        fprintf(stdout,"arguement error!\n");
        exit(EXIT_FAILURE);
    }
    int count;
    char filename[FILENAME_MAX];
    strcpy(filename,argv[1]);
    int len=strlen(filename);
    if(filename[len-1]=='\n')
        filename[len-1]='\0';
    FILE* p=fopen(filename,"rb");
    char buf[5*sizeof(char)];
    setvbuf(p,NULL,_IOFBF,200);
    while(!feof(p))
    {
        count=fread(buf,sizeof(char),5,p);
        for(int i=0;i<count;i++)
            fprintf(stdout,"%x ",buf[i]);
        fprintf(stdout,"| ");
        for(int i=0;i<count;i++)
            if(isprint(buf[i]))
                fprintf(stdout,"%c",buf[i]);
            else
                fprintf(stdout,".");
        fprintf(stdout,"\n");
    }
    fclose(p);
}

[此贴子已经被作者于2018-1-22 07:17编辑过]