C+++ practice Exam

Question 1

10

Points

a. Write function getData ( ) that will ask the user to input Student name and three exams; exam1, exam2 and exam3. This function should pass this data back to the main function.

b. Write the function call statement to call function getData( )

c. Write the prototype statement for function getData( )

Question 2

10

Points

a. Write function calcAverage( ) that will receive the three exam scores, calculate and return the average to main( ) function.

b. Write the function call statement to call function calcAverage( )

c. Write the function prototype for function calcAverage( )

Question 3

10

Points

a. Write function display( ) to display the student name, the three exam grades and the average with appropriate headings.

b. Write the function call statement to call function display( )

c. Write the prototype for function display( )

Question 4

5

Points

4. Function calls exist in the main ( ) function, write the Declaration section for all variables needed (5 points)

Question 5

6

Points

Given the input file name (datafile.txt) which has the following data:

John 95 3.8 A

Based on this file and data in it, answer the questions 5 thru 13

5. Write the declaration section to declare variable names for these data items. (6 points)

Question 6

4

Points

6. Declare an input file stream object. (4 points)

Question 7

4

Points

7. Declare an output file stream object. (4 points)

Question 8

4

Points

8. Write the statement to open the input file (datafile.txt) (4 points)

Question 9

4

Points

9. Write the statement to open the output file (outfile.txt). (4 points)

Question 10

4

Points

10. Write the statement to read these data items from the input file. (4 points)

Question 11

4

Points

11. Write a statement to send all data to the output file. (4 points)

Question 12

2

Points

12. Write the statement to close the input file. (2 points)

Question 13

2

Points

13. Write the statement to close the output file. (2 points)

Question 14

4

Points

14. Declare an array that has 4 items of type character and initialize it to the following items in one statement : A, B, C, D

Must declare the SIZE of the array as a constant

(4 points)

Question 15

4

Points

15. Declare an array of 5 floating point numbers and initialize it to the following items in one statement :

15.5, 26.2, 13.4, 7.3, 38.1

Must declare the SIZE of the array as a constant

(4 points)

Question 16

5

Points

16. Declare an array of 7 items and initialize it to the days of the week in one statement : Mon, Tue, Wed, Thu, Fri, Sat, Sun

Must declare the SIZE of the array as a constant

(5 points)

Question 17

7

Points

17. Declare an array of 100 grades of type integer, use a (for... loop) to prompt the user to input all the grades. (7 points)

declare the SIZE as a constant.

declare the array

use a " for loop" to ask the user to input the grades.

Question 18

11

Points

18. Given the array NUMBERS[7] which has the following data:

12

8

4

5

10

9

3

assuming that the array was declared and initialized with these values

What is the output of the following program segments?

a. int j = 4;

cout<< numbers[j]; // (1 point)

b. int x ;

x = numbers [3] * numbers [6];

cout<< x ; // (1 point)

c. cout<< numbers [7]; // (1 point)

d. cout<<( numbers [ 2 ] * 3); //(1 point)

e. Write the necessary statements to display all the elements of this array

(Declare the SIZE as a constant, and use a for loop to display all elements) (7 points)