#include <stdio.h>

typedef unsigned char *byte_pointer;

void show_bytes(byte_pointer start,size_t len){

    size_t i;
    for(i=0;i<len;i++){
    printf("%.2x",start[i]);
    }
    if(start[0] == 0xc7){
    printf("\n学号20155214的笔记本电脑是小端\n");
    }
    else{
    printf("\n学号20155214的笔记本电脑是大端\n");
    }
    printf("\n");

}

void show_int(int x){
    show_bytes((byte_pointer)&x,sizeof(int));
}

int main(){

    int x = -12345;
    printf("%d\n",x);
    show_int(x);

    return 0;
}