Homework 2              ENEE 114                Spring 2007

	POSTED: 12:20 pm Saturday March 10
        DUE: 11:59 pm Monday March 26

*       name your answers as hw2.1.c, hw2.2.c, ..., and submit 
        each of them via the GLUE submit command 
*       make sure that you document each hw2.x.c file

/****************************************************************************/

1. Write a C program to read in a list of integers from the screen and 
	print them out while expanding all the shorthand notations like 
	8-12 into its complete list 8, 9, 10, 11, 12. 
   The followings are some sample input-output pairs
	input: 1-4
	output: 1 2 3 4 
	
	input: 1 4-6 7-9
	output: 1 4 5 6 7 8 9

	input: 1-3 5 8 
	output: 1 2 3 5 8

2. Write a C program that converts a positive decimal integer into octal.
	The following shows by example how to do so.
   Given 327 in decimal, 
	1) divide 327 by 8, we get 40 as quotient and 7 as remainder
	2) divide 40 by 8, we get 5 as quotient and 0 as remainder
	3) divide 5 by 8, we get 0 as quotient and 5 as remainder
	4) the octal representation of 327 is 507

3. Write a program that asks user for an integer a and a positive integer b,
and outputs the value of a to the power of b. Use a loop to calculate the power.
You cannot use the power function in the math.h library. For example,

z: a.out
Enter an integer a and a positive integer b:3 1
Power(3, 1) = 3
z: a.out
Enter an integer a and a positive integer b:-2 9
Power(-2, 9) = -512
z: a.out
Enter an integer a and a positive integer b:9 -2
b = -2 is not positive.
z:
 
4. Write a C program that takes two inputs, a and b, and outputs c defined
	as follows:
	c = 0, if a = 0 and b = 0
	c = 1, if a = 0 and b = 1
	c = 1, if a = 1 and b = 0
	c = 0, if a = 1 and b = 1
	Error, otherwise
   (Hint: If you use switch statement, think about 2*a+b.) 

5. Debug the following program and submit the correct program under name 
hw2.5.c. Make sure that your corrected program complies and test it. 

	/* this program reads in nine numbers and prints out the largest number
	
	#INCLUDE <stdio.h>
	int main(void)
	{ int k=0, big=0;
	  int 9numbers[9];
	
	  print("Please enter nine integers:");
	  while (k <= 9)
	  { scanf("%d", 9numbers[k]);
	    ++k;
	  } 
	
	  while (k <= 9)  		// find the largest number
	  { if (big > 9numbers[k]) 
	      big = 9numbers[i];
	    k++; 
	   }
	   printf("%d\n", Big);
	
	   return 0;
	}