C++ for Scientists - Technische Universität Dresden

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128 CHAPTER 4. GENERIC PROGRAMMING • High Code Reuse with very Diverse Data Structures; • While still enabling High Performance. 4.11 Exercises TODO: Move exercises to next chapter 4.11.1 Unroll a loop Look at the loop from Subsection ??: int sum = 0; for (int i = 1 ; i
4.11. EXERCISES 129 1 2 3 4 function gcd(a, b): if b = 0 return a else return gcd(b, a mod b) Then write an integral metafunction that executes the same algorithm but at compile time. Your metafunction should be of the following form: template struct gcd meta { static int const value = ... ; } ; i.e. gcd meta::value is the GCD of a and b. Verify whether the results correspond with your C ++ function gcd(). 4.11.6 Overloading of functions Overloading of functions is possible for different types, e.g. void foo( int i ) { ... } void foo( double d ) { ... } This is an exercise on another form of overloading: based on a boolean meta expression. We will use the Boost functions enable if and disable if for this exercise. #include #include template typename boost::enable if< boost::is integral, T >::type foo( T const& v ) { return v ; } template typename boost::disable if< boost::is integral, T >::type foo( T const& v ) { return std::floor( v ) ; } If we call e.g. foo(5);, the compiler uses the special version for integers: template T foo( T const& v ) { return v ; } If we call e.g. foo(5.0);, the compiler uses the special version for types that are not integral: template T foo( T const& v ) { return std::floor( v ) ; }
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Technische Universität Dresden Fak
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Contents I Understanding C++ 7 Intr
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CONTENTS 5 10.5 Unix and Linux . .
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Part I Understanding C ++ 7
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10 C ++ was not a reliable computer
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12 CHAPTER 1. GOOD AND BAD SCIENTIF
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20 CHAPTER 2. C++ BASICS • std::c
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22 CHAPTER 2. C++ BASICS In the fir
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24 CHAPTER 2. C++ BASICS int main (
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26 CHAPTER 2. C++ BASICS Operator A
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28 CHAPTER 2. C++ BASICS The bitwis
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30 CHAPTER 2. C++ BASICS cast (type
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32 CHAPTER 2. C++ BASICS complicate
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34 CHAPTER 2. C++ BASICS } else if
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36 CHAPTER 2. C++ BASICS eps/= 2.0;
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38 CHAPTER 2. C++ BASICS for (...;
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40 CHAPTER 2. C++ BASICS 2.6.1 Inli
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42 CHAPTER 2. C++ BASICS To make su
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44 CHAPTER 2. C++ BASICS float divi
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46 CHAPTER 2. C++ BASICS The first
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48 CHAPTER 2. C++ BASICS #ifndef at
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50 CHAPTER 2. C++ BASICS float A[7]
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52 CHAPTER 2. C++ BASICS Encapsulat
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54 CHAPTER 2. C++ BASICS As a pract
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56 CHAPTER 2. C++ BASICS A function
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58 CHAPTER 2. C++ BASICS Now that t
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60 CHAPTER 2. C++ BASICS we need sm
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62 CHAPTER 2. C++ BASICS 2.12 Exerc
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64 CHAPTER 2. C++ BASICS 2.13 Opera
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66 CHAPTER 3. CLASSES apply symm bl
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68 CHAPTER 3. CLASSES int main() {
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70 CHAPTER 3. CLASSES class solver
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72 CHAPTER 3. CLASSES • Compilers
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74 CHAPTER 3. CLASSES a real number
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76 CHAPTER 3. CLASSES } return ∗t
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178 CHAPTER 5. META-PROGRAMMING };
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180 CHAPTER 5. META-PROGRAMMING } t
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182 CHAPTER 5. META-PROGRAMMING };
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184 CHAPTER 5. META-PROGRAMMING Com
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186 CHAPTER 5. META-PROGRAMMING tem
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188 CHAPTER 6. INHERITANCE { } std:
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190 CHAPTER 6. INHERITANCE 6.4.1 Ca
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192 CHAPTER 6. INHERITANCE dbp= sta
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194 CHAPTER 6. INHERITANCE Our comp
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196 CHAPTER 6. INHERITANCE Another
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198 CHAPTER 6. INHERITANCE
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200 CHAPTER 7. EFFECTIVE PROGRAMMIN
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Finite World of Computers Chapter 8
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8.2. MORE NUMBERS AND BASIC STRUCTU
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8.2. MORE NUMBERS AND BASIC STRUCTU
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8.4. THE OTHER WAY AROUND 231 As ca
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How to Handle Physics on the Comput
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Programming tools Chapter 10 In thi
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10.2. DEBUGGING 237 T& glas::contin
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10.3. VALGRIND 239 Stepi and Nexti
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10.5. UNIX AND LINUX 241 • top: l
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C ++ Libraries for Scientific Compu
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11.3. BOOST.BINDINGS 245 • Math a
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11.3. BOOST.BINDINGS 247 #include
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11.4. MATRIX TEMPLATE LIBRARY 249 c
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11.7. GEOMETRIC LIBRARIES 251 11.7.
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Real-World Programming Chapter 12 1
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12.1. TRANSCENDING LEGACY APPLICATI
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12.1. TRANSCENDING LEGACY APPLICATI
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Parallelism Chapter 13 13.1 Multi-T
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13.2. MESSAGE PASSING 261 int main
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Numerical exercises Chapter 14 In t
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14.1. COMPUTING AN EIGENFUNCTION OF
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14.3. THE SOLUTION OF A SYSTEM OF D
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14.4. GOOGLE’S PAGE RANK 275 Taki
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14.5. THE BISECTION METHOD FOR FIND
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14.6. THE NEWTON-RAPHSON METHOD FOR
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14.7. SEQUENTIAL NOISE REDUCTION OF
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14.7. SEQUENTIAL NOISE REDUCTION OF
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Programmierprojekte Kapitel 15 Die
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15.6. MATRIX-SKALIERUNG 287 Siehe h
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15.10. ANWENDUNG MTL4 AUF TYPEN MIT
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Acknowledgement Chapter 16 Special
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Bibliography [AG04] David Abrahams
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