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Chapter 4: Problem 4

include anywhere on the line, or if the # ne鈥� # Write and compile short programs to test the following issues: a. Determine whether your compiler will allow the #include anywhere on the line, or if the # needs to be flush with the left margin. b. Determine whether your compiler will allow space between the # and the include.

Short Answer

Expert verified
**Answer**: Based on the two test programs, the C++ compiler allows the #include directive anywhere on the line and also permits a space between the # and the include if the programs compile without any errors. However, it is recommended to keep the directive flush with the left margin and without a space between the # and include for better code readability and consistency.

Step by step solution

01

a. Testing if compiler allows #include anywhere on the line

To test if the compiler allows the #include directive anywhere on the line, we can create a sample program with the following content: ```cpp #include int main() { std::cout << "Hello world!" << std::endl; return 0; } ``` Here, we have added some spaces before the #include directive. Now, compile the program. If it compiles without any errors, then the compiler allows the directive anywhere on the line. Otherwise, it needs to be flush with the left margin.
02

b. Testing if compiler allows space between the # and the include

To test if the compiler allows space between the # and the include, we can create a sample program with the following content: ```cpp # include int main() { std::cout << "Hello world!" << std::endl; return 0; } ``` Here, we have added a space between the # and the include. Now, compile the program. If it compiles without any errors, then the compiler allows space between the # and the include. Otherwise, it requires no space between them.

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