Which of the following lines must be included in a program that has string variables? OA....

   

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Which of the following lines must be included in a program that has string variables? OA. #include (string class) B. #include C. #include namespace std; D. None of these OE. int var string; QUESTION 9 num+=6; is equivalent to OA. num = 6; OB. num+6= num; C. num= num + 6; D. num= num+ 6 QUESTION 10 This manipulator forces cout to print digits in fixed-point notation: A. setfixed(2) B. setprecision(2) OC. setw(2) OD. None of these E. fixed Which of the following lines must be included in a program that has string variables? OA. #include (string class) B. #include C. #include namespace std; D. None of these OE. int var string; QUESTION 9 num+=6; is equivalent to OA. num = 6; OB. num+6= num; C. num= num + 6; D. num= num+ 6 QUESTION 10 This manipulator forces cout to print digits in fixed-point notation: A. setfixed(2) B. setprecision(2) OC. setw(2) OD. None of these E. fixed

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The image contains three multiplechoice questions related to programming concepts in C The first que... View the full answer