CISC105 Fall 2006 Lab05

• Write a program for each of the following problems. Be sure to save every separate program. All programs must be properly commented and indented (see Assignment Standards on the class website).
  
  
• CODE! If you are having difficulty writing programs, consider programming more often. Working on C every day makes a big difference, and leaving it alone, even just for a weekend, can result in backsliding. You are learning a language and a way of thinking.
  
  
• Every function gets commented with a brief description. Discuss this with your TA to learn what is appropriate.
  
  
• Name each program lab05.n.c, where n is the number in the list below. For example, the name of the file for the first will be lab05.1.c. Put the files in your lab05 directory.
  
  

Programs

1. Write a program to demonstrate that when we pass an integer or double to a function from main(), changing the function parameter inside the function does not change the value in main.
   
   
2. Write a program to demonstrate that when we pass an entire array to a function from main(), changing an element of the function's array parameter inside the function does change the value in main.
   
   
3. Write a program that asks for user input (an integer), and uses a switch statement to print "obtuse" if the user enters 120 and "acute" if the user enters 42. For any other number the program should print "spam". You may only use three cases.
   
   
4. Write a program that asks for user input (a positive integer), and uses a switch statement to print "blue" if the number is 0-3; "white" if the number is 4-7; and "emerald" if the number is 8-11. Any other number should print "mauve". You may only use four cases. Hint: use integer operations to make this simple.
   
   
5. Use a shell command to copy the previous program. Place a do-while loop around the appropriate code so that the user is asked for data repeatedly. The program should stop when the user enters -1 (what is that number called? How should it appear in your program?).
   
   
6. Programs 1 and 2 are crucial points to understand for the rest of the semester. Be sure you see what is happening in your code and in your results. We'll discuss this in terms of the computer's memory in class.