represent a variable in machine code

machine_represent.c

#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]);
    }
    printf("\n");
}

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

void show_short(short x) {
    show_bytes((byte_pointer) &x, sizeof(x));
}

int main(int argc, char const *argv[])
{
    short v = -12345;
    show_short(v);
    unsigned short uv = 53191;
    show_short(uv);
    return 0;
}

-12345和53191的二进制表示是一样的，说明C语言是使用2补码表示数字的