Mathematics 1201: Programming in C
		 First Midterm Test, Answer Sheet
			Prof. Wickerhauser



In Problems 1--3 below, find the value of `x' after all of the following
statements are executed:

Problem 1.	int x = 11, y = 23;
		x /= y%4;
							ANSWER 1: x = 3
Problem 2.	int i, x;
		for ( i = 1, x = 1; i<=10; i<<=1 )
		  x += 0xC;
							ANSWER 2: x = 49
Problem 3.	#define E 2.71828
		int x; 
		x = E + 0.5;
							ANSWER 3: x = 3

Problem 4.  Suppose that A and B are int's with A = 3 and B = -1.  What is
the value of the following expression:

	++A + B++
						ANSWER 4: ++A + B++ == 3

Problem 5.  Suppose that A and B are int's with A = 1 and B = -1.  What will
the following code print:

	if ( A<0 || B<0 )
	if ( B>0 ) printf("1\n");
	else printf("2\n"); 
	else printf("3\n");
							ANSWER 5: 2

Problem 6:  

Write a complete ANSI C program to prompt for an integer between 1 and 99,
inclusive, and then print the sum of all the odd positive integers less than
or equal to it.

ANSWER 6:

	#include <stdio.h>
	main( void )
	  {
	    int n, i, sum;
	    printf("Enter a number between 1 and 99, inclusive: ");
	    scanf("%d", &n);
	    if(n<1 || n>99) return(1);
	    for(i=1; i<=n; i+=2) sum += i;
	    printf("%d\n", sum);
	    return(0);
	  }