CS 112b
Spring 2004
Ileana Streinu

• Comments from Hw1.
  • Something defined with
    #define MAX 50
    is NOT a global variable.
  • IN/OUT parameters to functions. Use references only when needed (for OUT or IN/OUT parameters). Not needed for arrays, because they are automatically passed as references (the name of an array is a pointer to its first element).
  • Readability: do not use int * a for an array, use instead int a[], it is more readable.
  • Do not use global variables, unless REALLY necessary (and you understand why). It is bad programming practice and the source of many errors, if not used properly.
  • Brief overview of local vs. global variables.
  • Menu options: should be in a loop, so that they can be used several times.
• Sorting algorithms, applets from Dominique's web page. Compare Insertion and Selection Sort. You must experiment with these applets to get a sense of what the algorithms are doing (informal homework).
• Selection sort on an array of integers, done in class, is here. Not finished. You must add the read and print functions for integer arrays, from your hwk 1.