CISC105 Spring 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).
  
  
• Many of the functions below are very similar to one another. You may take advantage of this to reduce the work you have to do - copy a working function and modify it to do a new task. However, because you are just learning the language, you should also practice writing functions from scratch a lot.
  
  
• 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 function (what three things do you need?). The function will not return a value. It will take a single integer parameter named size and will print a square of asterisks that size. Call the function from inside main. After the function is working correctly, add a loop in main() so that it continually asks the user for the size, prints the square if the number is positive, and quits if the number is negative or zero. Be sure your prompt explains the behavior.
   
   
2. Write a function called indent. It will be a void function and takes a single integer parameter called length. If the number is negative, the function prints "error" and returns. Otherwise, it prints length spaces (nothing else) and then returns.
   
   
3. Write a function that returns the value of its double input parameter squared. Call it from within a loop in main so it can be easily tested. Your final program should not have any print statements inside the function, though you may use them there for debugging.
   
   
4. Write a function that takes two parameters, double base and positive integer exponent (zero is positive). Use a loop to calculate base to the power exponent, and return the answer and print it in main() where your function is called from inside a loop.
   
   
5. Write a program that uses indent to create the indents for a drawing. Your program will use a for loop that calls indent to print the following (based on user input):

   % ./a.out 
   Enter height: 5
   *
    *
     *
      *
       *
   % 
   
   

   
   
   
6. Copy and expand the program from 5. All drawing functions must take a size parameter. Don't forget to save copies of your program each time you get something new to work.
   1. Add another function that prints a line of asterisks instead of a line of spaces.
      
      
   2. Take the code that prints the diagonal line of asterisks and put it inside a function called "downRight".
      
      
   3. Add another function called "upRight" that prints a diagonal going the other way:

         *
        *
       *
      *
      
      

      
      
      
   4. Add a function called "bigTop" that uses two other functions that you've already written to print figures like this:

      ****
       ***
        **
         *
      
      

      
      
      
   5. Add a function called "littleTop", similar to the last, that prints

         *
        **
       ***
      ****
      
      

      
      
      
   6. Add a loop and a switch statement so a user can choose what figure to print next. The program should only ask for size in one place; that size is passed to the selected drawing function as a parameter. Use a simple menu with integer choices for each drawing and another choice to quit.