Chapter 2, Problem 2.57HW

Explanation of Solution

Corresponding modified code for “show_bytes”:

#include <stdio.h>

//Define variable "byte_pointer" in char datatype.

typedef unsigned char* byte_pointer;

//Function definition for show_bytes.

void show_bytes(byte_pointer start, size_t len)

{

  //Declare variable "i" in int data type.

  int i;

/* "For" loop to determine byte representation in hexadecimal */

  for (i = 0; i < len; i++)

    //Display each bytes in "2" digits hexadecimal value.

    printf(" %.2x", start[i]);

  printf("\n");

}

//Function to determine byte for "int" data type value.

void show_int(int x)

{

  //Call show_bytes function with integer value.

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

}

//Function to determine byte for "float" data type value.

void show_float(float x)

{

  //Call show_bytes function float value.

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

}

//Function to determine byte for "pointer" value.

void show_pointer(void *x)

{

  //Call show_bytes function with pointer value.

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

}

//Function to determine byte for "short" data type value.

void show_short(short x)

{

//Call show_bytes function with short int value.

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

}

//Function to determine byte for "long" data type value.

void show_long(long x)

{

//Call show_bytes function with long value.

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

}

//Function to determine byte for "double" data type value.

void show_double(double x)

{

//Call show_bytes function with double value.

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

}

//Test all show bytes.

void test_show_bytes(int val)

{

  //Define variables.

  int ival = val;

  float fval = (float) ival;

  int *pval = &ival;

  //Call function.

  show_int(ival);

  show_float(fval);

  show_pointer(pval);

//Define variables.

short sval = (short) ival;

long lval = (long) ival;

double dval = (double) ival;

//Call function.

    show_short(sval);

    show_long(lval);

    show_double(dval);

}

//Main function.

int main(int argc, char* argv[])

{

  //Define the sample value.

  int sampleValue = 1024;

  //Call test_show_bytes function.

  test_show_bytes(sampleValue);

  return 0;

}

The given program is used to display the byte representation of different program objects by using casting...