Programming in C

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Exercises 163 represents a quadratic equation where a = 4, b = –17, and c = –15.The values of x that satisfy a particular quadratic equation, known as the roots of the equation, can be calculated by substituting the values of a, b,and c into the following two formulas: If the value of b 2 –4ac, called the discriminant, is less than zero, the roots of the equation, x 1 and x 2 ,are imaginary numbers. Write a program to solve a quadratic equation.The program should allow the user to enter the values for a, b,and c. If the discriminant is less than zero, a message should be displayed that the roots are imaginary; otherwise, the program should then proceed to calculate and display the two roots of the equation. (Note: Be certain to make use of the squareRoot function that you developed in this chapter.) 9. The least common multiple (lcm) of two positive integers u and v is the smallest positive integer that is evenly divisible by both u and v.Thus, the lcm of 15 and 10, written lcm (15, 10), is 30 because 30 is the smallest integer divisible by both 15 and 10.Write a function lcm that takes two integer arguments and returns their lcm.The lcm function should calculate the least common multiple by calling the gcd function from Program 8.6 in accordance with the following identity: lcm (u, v) = uv / gcd (u, v) u, v >= 0 10. Write a function prime that returns 1 if its argument is a prime number and returns 0 otherwise. 11. Write a function called arraySum that takes two arguments: an integer array and the number of elements in the array. Have the function return as its result the sum of the elements in the array. 12. A matrix M with i rows, j columns can be transposed into a matrix N having j rows and i columns by simply setting the value of N a,b equal to the value of M b,a for all relevant values of a and b. a. Write a function transposeMatrix that takes as an argument a 4 x 5 matrix and a 5 x 4 matrix. Have the function transpose the 4 x 5 matrix and store the results in the 5 x 4 matrix.Also write a main routine to test the function. b. Using variable-length arrays, rewrite the transposeMatrix function developed in exercise 12a to take the number of rows and columns as arguments, and to transpose the matrix of the specified dimensions. 13. Modify the sort function from Program 8.12 to take a third argument indicating whether the array is to be sorted in ascending or descending order.Then modify the sort algorithm to correctly sort the array into the indicated order. 14. Rewrite the functions developed in the last four exercises to use global variables instead of arguments. For example, the preceding exercise should now sort a globally defined array.
164 Chapter 8 Working with Functions 15. Modify Program 8.14 so that the user is reasked to type in the value of the base if an invalid base is entered.The modified program should continue to ask for the value of the base until a valid response is given. 16. Modify Program 8.14 so that the user can convert any number of integers. Make provision for the program to terminate when a zero is typed in as the value of the number to be converted.
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Programming in C Third Edition
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Programming in C Third Edition Step
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❖ To my mother and father ❖
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Table of Contents 1 Introduction 1
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Contents ix Character Arrays 108 Ba
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Contents xi Pointers to Functions 2
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Contents xiii 17 Miscellaneous and
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Contents xv 6.0 Storage Classes and
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Preface It’s hard to believe that
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Acknowledgements I wish to thank th
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1 Introduction THE C PROGRAMMING LA
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Introduction 3 terminology. It also
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6 Chapter 2 Some Fundamentals Highe
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8 Chapter 2 Some Fundamentals durin
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10 Chapter 2 Some Fundamentals the
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12 Chapter 3 Compiling and Running
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22 Chapter 4 Variables, Data Types,
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5 Program Looping IFYOU ARRANGE 15
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The for Statement 45 Program 5.2 Co
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The for Statement 47 When the loop_
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The for Statement 49 constitutes th
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The for Statement 51 The primary ch
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The for Statement 53 Nested for Loo
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The for Statement 55 Multiple Expre
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The while Statement 57 Program 5.6
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The while Statement 59 Program 5.7
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The do Statement 61 do program stat
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Exercises 63 Now that you are famil
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6 Making Decisions IN CHAPTER 5,“
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The if Statement 67 The program was
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The if Statement 69 would do the tr
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The if Statement 71 When writing pr
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The if Statement 73 To illustrate t
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The if Statement 75 Nested if State
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The if Statement 77 separate if sta
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The if Statement 79 Program 6.7 Con
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The if Statement 81 Program 6.8 Con
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The if Statement 83 Program 6.8A Co
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The switch Statement 85 if ( expres
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Boolean Variables 87 switch (operat
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Boolean Variables 89 “off,” its
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The Conditional Operator 91 Program
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Exercises 93 Exercises 1. Type in a
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7 Working with Arrays THE C LANGUAG
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Defining an Array 97 sequences thro
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Defining an Array 99 values [0] 197
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Defining an Array 101 proceeding wi
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Defining an Array 103 As a point of
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Defining an Array 105 the term “p
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Initializing Arrays 107 Arrays of c
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Character Arrays 109 The most notab
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Character Arrays 111 Program 7.7 Co
Page 134 and 135: Multidimensional Arrays 113 example
Page 136 and 137: Variable-Length Arrays 115 Pay part
Page 138 and 139: Exercises 117 than 1 or greater tha
Page 140 and 141: 8 Working with Functions BEHIND ALL
Page 142 and 143: Defining a Function 121 appears.Thi
Page 144 and 145: Arguments and Local Variables 123 p
Page 146 and 147: Arguments and Local Variables 125 w
Page 148 and 149: Returning Function Results 127 defi
Page 150 and 151: Returning Function Results 129 In C
Page 152 and 153: Functions Calling Functions Calling
Page 158 and 159: Functions and Arrays 137 As you can
Page 160 and 161: Functions and Arrays 139 Program 8.
Page 164 and 165: Functions and Arrays 143 When you w
Page 168 and 169: Functions and Arrays 147 An entire
Page 174 and 175: Global Variables 153 In Program 8.1
Page 176 and 177: Global Variables 155 much improved
Page 178 and 179: Automatic and Static Variables 157
Page 180 and 181: Recursive Functions 159 Recursive F
Page 182 and 183: Recursive Functions 161 With the va
Page 186 and 187: 9 Working with Structures CHAPTER 7
Page 188 and 189: A Structure for Storing the Date 16
Page 190 and 191: A Structure for Storing the Date 16
Page 192 and 193: Functions and Structures 171 end of
Page 194 and 195: Functions and Structures 173 Progra
Page 198 and 199: Functions and Structures 177 illust
Page 202 and 203: Initializing Structures 181 sets th
Page 204 and 205: Arrays of Structures 183 Initializa
Page 206 and 207: Structures Containing Structures 18
Page 208 and 209: Structures Containing Arrays 187 Na
Page 210 and 211: Structures Containing Arrays 189 Pr
Page 212 and 213: Exercises 191 struct date { int mon
Page 214: Exercises 193 previously.This funct
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Page 229 and 230: 208 Chapter 10 Character Strings In
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214 Chapter 10 Character Strings of
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216 Chapter 10 Character Strings Es
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218 Chapter 10 Character Strings co
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220 Chapter 10 Character Strings In
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222 Chapter 10 Character Strings Pr
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224 Chapter 10 Character Strings No
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226 Chapter 10 Character Strings Pr
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228 Chapter 10 Character Strings ca
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230 Chapter 10 Character Strings Th
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232 Chapter 10 Character Strings to
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11 Pointers IN THIS CHAPTER,YOU EXA
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Defining a Pointer Variable 237 Pro
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Using Pointers in Expressions 239 (
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Working with Pointers and Structure
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The Keyword const and Pointers 253
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Pointers and Functions 255 Program
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Pointers and Functions 257 You shou
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Pointers and Arrays 259 displayed.T
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Pointers and Arrays 261 To set text
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Pointers and Arrays 263 Program 11.
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Pointers and Arrays 265 eliminate t
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Pointers and Arrays 267 Program 11.
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Pointers and Arrays 269 just seen,
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Pointers and Arrays 271 Execution o
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Pointers to Functions 273 Program 1
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Pointers and Memory Addresses 275 m
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Exercises 277 8. Write a function c
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280 Chapter 12 Operations on Bits T
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282 Chapter 12 Operations on Bits W
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284 Chapter 12 Operations on Bits B
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286 Chapter 12 Operations on Bits w
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288 Chapter 12 Operations on Bits h
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290 Chapter 12 Operations on Bits I
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292 Chapter 12 Operations on Bits P
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294 Chapter 12 Operations on Bits o
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296 Chapter 12 Operations on Bits }
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298 Chapter 12 Operations on Bits a
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300 Chapter 13 The Preprocessor def
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302 Chapter 13 The Preprocessor By
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304 Chapter 13 The Preprocessor the
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306 Chapter 13 The Preprocessor els
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308 Chapter 13 The Preprocessor are
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310 Chapter 13 The Preprocessor ass
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312 Chapter 13 The Preprocessor The
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314 Chapter 13 The Preprocessor Sup
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316 Chapter 13 The Preprocessor Sys
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318 Chapter 13 The Preprocessor wan
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320 Chapter 13 The Preprocessor Exe
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322 Chapter 14 More on Data Types d
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324 Chapter 14 More on Data Types P
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326 Chapter 14 More on Data Types T
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328 Chapter 14 More on Data Types 4
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330 Chapter 14 More on Data Types F
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15 Working with Larger Programs THE
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Dividing Your Program into Multiple
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Communication Between Modules 337 v
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Communication Between Modules 339 S
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Communication Between Modules 341 U
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Other Utilities for Working with La
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Other Utilities for Working with La
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348 Chapter 16 Input and Output Ope
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374 Chapter 17 Miscellaneous and Ad
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390 Chapter 18 Debugging Programs P
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396 Chapter 18 Debugging Programs Y
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398 Chapter 18 Debugging Programs O
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400 Chapter 18 Debugging Programs L
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406 Chapter 18 Debugging Programs m
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408 Chapter 18 Debugging Programs A
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19 Object-Oriented Programming BECA
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Writing a C Program to Work with Fr
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Defining an Objective-C Class to Wo
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Defining an Objective-C Class to Wo
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Defining a C++ Class to Work with F
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Defining a C++ Class to Work with F
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Defining a C# Class to Work with Fr
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A C Language Summary THIS SECTION S
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3.0 Constants 427 3.0 Constants 3.1
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3.0 Constants 429 In the octal char
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4.0 Data Types and Declarations 431
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5.0 Expressions 439 As an example,
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5.0 Expressions 441 Table A.5 Conti
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5.0 Expressions 443 1. As the value
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5.0 Expressions 445 The usual arith
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5.0 Expressions 447 5.11 sizeof Ope
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5.0 Expressions 449 Pointers to Arr
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5.0 Expressions 451 Types other tha
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6.0 Storage Classes and Scope 453 T
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7.0 Functions 455 int printf (char
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8.0 Statements 457 Execution of a b
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8.0 Statements 459 the null stateme
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9.0 The Preprocessor 461 Table A.7
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9.0 The Preprocessor 463 produces p
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9.0 The Preprocessor 465 In either
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B The Standard C Library THE STANDA
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Standard Header Files 469 This hea
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String Functions 471 char *strerror
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I/O Functions 473 Character Functio
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I/O Functions 475 FILE *fopen (file
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I/O Functions 477 size_t fwrite (bu
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String-to-Number Conversion 479 int
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Dynamic Memory Allocation Functions
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Math Functions 483 int islessequal
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Math Functions 485 double fma (x, y
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Math Functions 487 double remquo (x
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Math Functions 489 double complex c
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General Utility Functions 491 argum
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494 Appendix C Compiling Programs w
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D Common Programming Mistakes THE F
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Common Programming Mistakes 499 7.
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E Resources THIS APPENDIX CONTAINS
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Miscellaneous 503 Visual Studio htt
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Index Symbols \’ (single quote) e
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arrays 507 functions, 122-123 decla
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C language 509 bits, 279 bit fields
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character strings 511 calculating a
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copying 513 Compiling the Debug Cod
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derived data types 515 breakpoint d
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file I/O operations 517 enumerated
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functions 519 formatted I/O operati
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functions 521 I/O, 473-478 fclose(
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grep utility 523 strncat( ), 471 st
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int data type 525 programs Calculat
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macros 527 llround( ) function, 486
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OOP 529 multiple source files, comp
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prime numbers 531 character string
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programs 533 bitwise operators, Ill
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eferencing defined values 535 synta
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statements 537 search methods binar
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summing array elements 539 string_l
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variable-length character strings 5
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Xcode 543 Introducing the while Sta
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