Homework 1 Information, ECS50 Spring 2000

• Homework due by Midnight on Monday, April 10
• Do all problems.

Assignment:

(1) Do Problem 1.2 with the following numbers:
	27, 87365, 19, 2049, 255, 128, 65535

(2) Problem 1.3

(3) Do Problem 1.4 with the following numbers: (0x = base 16, 0o = base 8)
	0xB319, 0xFD83, 0x1A53, 0x3EC6 
	0o6732, 0o1234, 0o7074, 0o4635

(4) Do Problem 1.5 with the following binary numbers: 
	0 1 0 1 1 1 1 1 0 0 1 1
	0 0 1 0 1 1 0 0 1 0 0 0 1 
	1 0 1 1 0 1 1 0 1 1 1 1 0 0 0 0
	1 0 0 1 0 1 0 0 1 0 1 1 1 0 1 0
	0 0 1 1 1 1 1 1 0 0 1 0 1 0 1 1

(5) Do Problem 1.6 with the following numbers:
	-77, 1151, 452, -20413, -3, 40

(6) Do Problem 1.7 with the following hex numbers:
	FDA0, 1923, D3A8, 76AC, 39B3, 80A2

(7) Do Problem 1.8 assuming a 13-bit word size.

(8) Do Problem 1.9 (a) with the following patterns:

	$5468697320636C61737320697320677265617421
	$54686579277665206B696C6C6564204B656E6E7921

    Do Problem 1.9 (b) with the following strings:

	"You ROCK!
	"Here Today ..."
	"What's Happening?"

(9) Do Problem 1.11 (a) with the following numbers:

	$85730C, $89E248

    Do Problem 1.11 (b) with the following numbers:

	75.25, -34.625

10:  Program: This is a small C program to further explore data conversion as 
well as to shake the rust off your programming skills. 

1. Implement the C library function atoi(). 

                    int my_atoi(char *str);

This function takes a string of digits as its argument and returns the integer 
it represents. The number begins with a digit (or a '-' for negative numbers) 
and is finished at the end of the string or at any non-numeric character. 
Don't worry about NULL strings or overflow. (The C library doesn't, so why 
should you?) 

      Examples: 
       atoi("23")	returns 23
       atoi("-2")	returns -2
       atoi("112abc")	returns 112
       atoi("hello?")	returns 0