#include <stdio.h>

#include <string.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(int));

}

void show_float(float x) {

show_bytes((byte_pointer)&x, sizeof(float));

}

void show_pointer(void *x) {

show_bytes((byte_pointer)&x, sizeof(void *));

}

void test_show_bytess(int val) {

int ival = val;

float fval = (float)val;

int *pval = &ival;

show_int(ival);

show_float(fval);

show_pointer(pval);

}

int main() {

test_show_bytess(12345);

/** for ex2.5 */

printf("ex2.5\n");

test_show_bytess(0x87654321);

/** for ex2.7 */

printf("ex2.7\n");

show_bytes("abcdef", strlen("abcdef"));

}