/**
 * TABLEOFPOWERS.C 
 *
 * Exercise solution 2.4.  (C By Dissection Chap. 4, ex. 2)
 *
 * Computes a table of powers.
 * 25-Feb-03 by Dimon
 **/


/**
 * INCLUDE statements 
 **/
#include <stdio.h>
#include <stdlib.h>


/**
 * DEFINE statements
 **/
#define NUMROWS 25



/**
 * Function declarations
 **/
int square(int x);
int cube(int x);
int quartic(int x);
int quintic(int x);

/**
 * The main function
 **/
int main(void) {  
  
  /* Declaration of variables */

  int i = 1; 
  int status = 0;


  /* Display table header */
  
  printf("A Table of Powers\n");
  printf("-----------------\n");
  printf("\n");
  printf("Integer   Square     Cube  Quartic  Quintic\n");
  printf("-------   ------     ----  -------  -------\n");


  /* A FOR loop calculates and prints out the results in the table */ 

  for(i = 1; i < NUMROWS; i++) {
    printf("%7d  ",i);
    printf("%7d  ",square(i));
    printf("%7d  ",cube(i));
    printf("%7d  ",quartic(i));
    printf("%7d  ",quintic(i));
    printf("\n");
  } /* End of FOR loop */

  /* Terminate program */
  return status;    

} /* END OF MAIN */


/**
 * Function definitions
 **/

/**
 * Returns the square (x^2) of the argument.
 **/
int square(int x) {
  return x*x;
}

/**
 * Returns the cube (x^3) of the argument.
 **/
int cube(int x) {
  return square(x)*x;
}

/**
 * Returns the quartic (x^4) of the argument.
 **/
int quartic(int x) {
  return square(square(x));
}

/**
 * Returns the quintic (x^5) of the argument.
 **/
int quintic(int x) {
  return square(x)*cube(x);
}