3. Given the function adden above, what property of C was used on addendb to assign a value to whole?
A) automatic changing
B) promotion
C) dominating
D) forced or explicit conversion
4. Given the function adden above, if three variables are declared in the main function as follows: int operand1 = 16, operand3; float operand2 = 3.9; and the main routine has the statement operand3 = adden( operand1, operand2 ); what are the values of operand1 and operand2 after the call to adden?
A) operand1 = 16 and operand2 = 3.9
B) operand1 = 16 and operand2 = 3
C) operand1 = 20 and operand2 = 3.9
D) operand1 = 20 and operand2 = 3
5. Given the function adden above, if we had left out the (int) in the assignment to whole, with addendb = 67.8 and the program still compiled correctly, what would you expect the program execution to assign to whole?
A) Since the program compiled correctly, in execution it will have a syntax error
B) Since the program compiled correctly, in execution whole would get 67.8
C) Since the program compiled correctly, in execution whole would get 67
D) Since the program compiled correctly, in execution whole would be automatically cast to float
6. Declare a variable named tasteful as an array with 10 characters in it. Initialize all of the elements of this array as part of the declaration. You may initialize the array elements to any values that match the type of the array. {8}
7. a) Convert the following decimal number to its hexadecimal representation: 467310
{8}
b) Convert the signed hexadecimal number from above to its binary representation using a sign bit, and record it in the 16-bit space below. {7}
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8. Assume all the variables used in the code fragment below that are not explicitly declared, have been declared previously in the program. What combinations of values being tested could cause the final value of outcome to be 0? {20}
int condition = 0, test, flag = 20; HINT: Look at each assignment to outcome
… /* other C code here */ to see if there is ANY set of values that would
if (!flag) make it equal 0. If so, what conditions would
outcome = condition + flag; have to be true to get those values? Remember
else if (!condition) to think about what actions might have
{ happened at the /*commented*/ line.
test = ++condition * flag;
outcome = test ^ !flag;
}
else if (flag | condition)
outcome = 0;
else
outcome = test = condition *= flag;
List all the combinations of the values that will make outcome = 0;
9. Given the declarations and the for loop below: {10}
float array[10];
for ( i = 10, --i ; i ≥ 0 ; i-- ) {
array[i] = 2 * (10 – i) - 1;
}
what values will array[0] and array[6] have after the for loop has completed?
a[0] =
a[6] =
10. List two (2) C library files and two (2) preprocessor commands. {8}
11. Define a function to calculate the slope and the y-axis-intercept from two input points on a line drawn on a Cartesian plane. Slope (typically called ‘m’) is calculated as rise over run, or the difference in y divided by the difference in x. The y-axis-intercept (typically called ‘b’) is the height at which the line crosses the y axis. {19}
Read in two points, given as (x1, y1) and (x2, y2), then calculate the slope and y-intercept. Have your function print as output the two input points and the equation of the line containing those points in slope-intercept form (y = mx + b).
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Extra Credit questions - Worth two {2} points each.
XC1. Given the function adden, used above in questions 1 through 4, what mathematical operation is essentially being performed on addendb?
A) taking the floor
B) taking the ceiling
C) rounding
D) squaring
XC2. Which of the following types of operations cannot be used with floating point numbers in ANSI C?
A) Arithmetic
B) Bitwise
C) Logical
D) Relational
XC3. Which of the following would not evaluate to true?
A) ( 7 & 16 )
B) ( ‘u’ – ‘s’ )
C) ( 463.982201 )
D) ( 9 + --8.99999999 )
XC4. If we used the the following code fragment:
k = 100;
while !(k = 0)
k--;
which of the following would NOT be true?
A) The value of k would decrease in every iteration of the loop.
B) The loop would run at least 100 times.
C) The while loop would stop when k’s value was equal to 0.
D) The decrement operation happens after the loop test each iteration.
XC5. Which of the following would create an array of integers with 4 in the 3rd element?
A) int temps[5] = {1, 2, 3, 4};
B) array[3] = 4;
C) char small[3] = {4, 4, 4};
D) int hold[4] = {4, 3, 2, 1};