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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

  1. Write a program that prints out the numeric values of characters Z and z.
  2. Given two numeric values, 72 and 104, write a program to print out the corresponding two characters.
  3. For a 16-bit integer variable, can you assign the variable with an integer value of 32768?
  4. 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.
  5. Write a program that can print out the numeric value of the newline character (\n). (Hint: assign `\n' to a character variable.)

 

Related Items

Using the Precision Specifier

Using the Precision Specifier

Aligning Output

Aligning Output
As you might have noticed in the previous section, all output is right-justified. In other words, by default, all output is placed on the right edge of the field, as long as the field width is longer than the width of the output.

 

Adding the Minimum Field Width

Adding the Minimum Field Width

Converting to Hex Numbers

Converting to Hex Numbers

Revisiting the printf() Function

Revisiting the printf() Function

The printf() function is the first C library function you used in this book to print out messages on the screen. printf() is a very important function in C, so it's worth it to spend more time on it.