396 Chapter 8 ▼ The Preprocessor Exercises 1 A program that contains macros with arguments can be difficult to debug. Most C compilers provide an option that causes the preprocessor to write its output on the screen with no further compilation taking place. Put the following code in a file, say try_me.c. #include #define PRN (X) int main(void) { printf("x\n"); PRN (Hello from main()); return 0; Next, compile the program and run it. You will see that it does not print what was expected. To see how the preprocessor treats this code, give the command cc -E try_me.c (Use redirection if you want to take a careful look at what gets produced.) If the -E not option is not the right one for your compiler, find out what the correct option is. Note that the identifier PRN does not get generated by the preprocessor. Explain why. Fix the code. Hint: Use stringization.

396 Chapter 8 ▼ The Preprocessor Exercises 1 A program that contains macros with arguments can be difficult to debug. Most C compilers provide an option that causes the preprocessor to write its output on the screen with no further compilation taking place. Put the following code in a file, say try_me.c. #include #define PRN (X) int main(void) { printf("x\n"); PRN (Hello from main()); return 0; Next, compile the program and run it. You will see that it does not print what was expected. To see how the preprocessor treats this code, give the command cc -E try_me.c (Use redirection if you want to take a careful look at what gets produced.) If the -E not option is not the right one for your compiler, find out what the correct option is. Note that the identifier PRN does not get generated by the preprocessor. Explain why. Fix the code. Hint: Use stringization.

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter8: I/o Streams And Data Files

Section8.3: Random File Access

Problem 6E

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