CIS71, Section 4
FIVE MINUTE TEST #6
October 17, 2006




(10)	1. (a) What are the preconditions of a function?
	   (b) What are the postconditions of a function?










(10)	2. Here is a function that given an integer array a with n elements
	   returns the largest value in a. What is the loop invariant?
		int findMax(int a[], in n) {
		    int who = a[0];
		    int k;
		    for ( k = 1; k < n; k++ )
			if ( a[k] > who )
			    who = a[k];
		    return who;
		}







(5)	3. What is printed out by the following statements?
		printf("$");
		int k;
		for ( k = 1; k <= 5; k++)
		    printf("$");
		printf("*\n");





(5)	4. What does the input function fgets do?





(10)	5. Implement the function int mystrlen(const char *s) that
	   has the same behavior as the standard function strlen
	   (i.e. it returns the lenght of the string s).