Exercises : Answer the following Question

Workshop
To help solidify your understanding of this hour's lesson, you are encouraged to answer the quiz questions and finish the exercises provided in the Workshop before you move to the next lesson. The answers and hints to the questions and exercises are given in Appendix E, "Answers to Quiz Questions and Exercises."

Quiz

1. Are the integer divisions of 134/100 and 17/10 equal?

2. Is the result of 3000 + 1.0 a floating-point number? How about 3000/1.0?

3. How can you represent the following numbers in scientific notation?

3500 0.0035 -0.0035

4. Are the following variable names valid?

7th_calculation
Tom's_method
_index
Label_1

Exercises

Write a program that prints out the numeric values of characters Z and z.
Given two numeric values, 72 and 104, write a program to print out the corresponding two characters.
For a 16-bit integer variable, can you assign the variable with an integer value of 32768?
Given the declaration double dbl_num = 123.456;, write a program that prints out the value of dbl_num in both floating-point and scientific notation formats.
Write a program that can print out the numeric value of the newline character (\n). (Hint: assign `\n' to a character variable.)

39 views

The #define and #undef Directives

The #define and #undef Directives

The #define directive is the most common preprocessor directive, which tells the preprocessor to replace every occurrence of a particular character string (that is, a macro name) with a specified value (that is, a macro body).

The C Preprocessor Versus the Compiler

The C Preprocessor Versus the Compiler

One important thing you need to remember is that the C preprocessor is not part of the C compiler.

What Is the C Preprocessor?

If there is a constant appearing in several places in your program, it's a good idea to associate a symbolic name to the constant, and then use the symbolic name to replace the constant throughout the program. There are two advantages to doing so. First, your program will be more readable.