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Chapter 2: Problem 11

include statement D) All of the above # Every C++ program must have a A) cout statement B) function main C) #include statement D) All of the above

Short Answer

Expert verified
A) cout statement B) function main C) #include statement D) All of the above Answer: B) function main

Step by step solution

01

Analyzing Option A: cout statement

A cout statement is used for displaying output on the screen. It is not mandatory for every C++ program to have a cout statement, as some programs might not have any output to display. Therefore, option A is not necessary for every C++ program.
02

Analyzing Option B: function main

The main function is the starting point of every C++ program. It is where the execution of the program begins. Without a main function, the program will not run, and the compiler will raise an error. Thus, option B is necessary for every C++ program.
03

Analyzing Option C: #include statement

The #include statement is used to include external libraries and header files in the C++ program. These libraries and header files offer additional functionality beyond the basic features of the language. While many programs utilize external libraries, not every C++ program requires an #include statement. A simple program without external libraries can still be compiled and executed. Therefore, option C is not necessary for every C++ program.
04

Conclusion

Based on the analysis of each option, we can conclude that the necessary component for every C++ program is option B) function main. Thus, the correct answer is not D) All of the above, but B) function main.

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Most popular questions from this chapter

include (iostream) B) #include {iostream} C) #include D) #include [iostream] E) All of the above # Which of the following statements is correct? A) #include (iostream) B) #include {iostream} C) #include D) #include [iostream] E) All of the above

Write assignment statements that perform the following operations with the variables a, b, and c. A) Adds 2 to a and stores the result in b. B) Multiplies b times 4 and stores the result in a. C) Divides a by 3.14 and stores the result in b. D) Subtracts 8 from b and stores the result in a. E) Stores the value 27 in a. F) Stores the character ‘K’ in c. G) Stores the ASCII code for ‘B’ in c.

When do preprocessor directives execute? A) Before the compiler compiles your program B) After the compiler compiles your program C) At the same time as the compiler compiles your program D) None of the above

A variable must be defined before it can be used.

include using namespace std; int main() { int freeze = 32, boil = 212; freeze = 0; boil = 100; cout … # What will the following programs print on the screen? A) #include using namespace std; int main() { int freeze = 32, boil = 212; freeze = 0; boil = 100; cout << freeze << endl << boil << endl; return 0; } B) #include using namespace std; int main() { int x = 0, y = 2; x = y * 4; cout << x << endl << y << endl; return 0; } C) #include using namespace std; int main() { cout << "I am the incredible"; cout << "computing\nmachine"; cout << "\nand I will\namaze\n"; cout << "you."; return 0; } D) #include using namespace std; int main() { cout << "Be careful\n"; cout << "This might/n be a trick "; cout << "question\n"; return 0; } E) #include using namespace std; int main() { int a, x = 23; a = x % 2; cout << x << endl << a << endl; return 0; }
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