24. Which of the following is an invalid variable assignment assume all ecesary lbrury files have been ineluded)? a. char e = '0'; b, char c "c3". c. long z 3; d. string w 5' e, short z = 3; 25. In a C++ program, two slash marks (//) indicate a. the beginning of a single-line comment b. integer division c. the beginning of a block of code d. e. the beginning of a multiline comment the end of a statement A statement that starts with a octothorpe or hashtag symbol (#) is called a a. library file b. c. header file 26, d. comment e. assignment statement preprocessor directive The central processing unit of a computer consists primarily of: a. b. 27 input and output devices memory and secondary storage C++ code d. e. control unit and arithmetic-logic unit control unit decoder c. 28. What is stored in the variable n by the following C++ statement? int n = (4.0 + 6.1) * 8 + 5 / 2.0; a. 46 b. 83 c. 60.6 d. 46.8 e. 37.85 Exam-1F CMPSC 201 - Fall 2017