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Learn C Programming. - Second Edition

You're reading from  Learn C Programming. - Second Edition

Product type Book
Published in Aug 2022
Publisher Packt
ISBN-13 9781801078450
Pages 742 pages
Edition 2nd Edition
Languages
Author (1):
Jeff Szuhay Jeff Szuhay
Profile icon Jeff Szuhay

Table of Contents (37) Chapters

Preface 1. Part 1: C Fundamentals
2. Chapter 1:Running Hello, World! 3. Chapter 2: Understanding Program Structure 4. Chapter 3: Working with Basic Data Types 5. Chapter 4: Using Variables and Assignments 6. Chapter 5: Exploring Operators and Expressions 7. Chapter 6: Exploring Conditional Program Flow 8. Chapter 7: Exploring Loops and Iterations 9. Chapter 8: Creating and Using Enumerations 10. Part 2: Complex Data Types
11. Chapter 9: Creating and Using Structures 12. Chapter 10: Creating Custom Data Types with typedef 13. Chapter 11: Working with Arrays 14. Chapter 12: Working with Multi-Dimensional Arrays 15. Chapter 13: Using Pointers 16. Chapter 14: Understanding Arrays and Pointers 17. Chapter 15: Working with Strings 18. Chapter 16: Creating and Using More Complex Structures 19. Part 3: Memory Manipulation
20. Chapter 17: Understanding Memory Allocation and Lifetime 21. Chapter 18: Using Dynamic Memory Allocation 22. Part 4: Input and Output
23. Chapter 19: Exploring Formatted Output 24. Chapter 20: Getting Input from the Command Line 25. Chapter 21: Exploring Formatted Input 26. Chapter 22: Working with Files 27. Chapter 23: Using File Input and File Output 28. Part 5: Building Blocks for Larger Programs
29. Chapter 24: Working with Multi-File Programs 30. Chapter 25: Understanding Scope 31. Chapter 26: Building Multi-File Programs with Make 32. Chapter 27:Creating Two Card Programs 33. Epilogue 34. Assessments 35. Other Books You May Enjoy Appendix

Using format specifiers for floats and doubles

Floating-point numbers are floats, doubles, and long doubles that can be expressed in a number of ways mathematically. They can be expressed naturally where there is a whole number part and a fractional part. They can be expressed in scientific notation where there is a coefficient raised to a power of 10, and it takes the 1.234567 x 10^123 form. The decimal point floats in such a way that the coefficient has a whole number part that is between 1 and 10 and the exponent is adjusted accordingly. C provides both of these formats.

The next example program is double.c, and it begins as follows:

#include <stdio.h>
int main( void )  {
  double aDouble = 987654321.987654321;
  // the other code snippets go here.
}

In this program, only one value is defined. Whenever the value is to be converted into float, it...

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