Chapter 24 // Drill 8 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 24 // Drill 8

Read six ints into a Matrix<int,2> m(2,3) and print them out.

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2024/Drills/Drill%208

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Chapter 24 // Drill 7 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 24 // Drill 7

Read ten complex<double>s from cin (yes, cin supports >>  for complex) and put them into a Matrix. Calculate and output the sum of the ten complex numbers.

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2024/Drills/Drill%207

Complex does have built in I/O support which is nice. Figuring out how to use cin was annoying though. I eventually discovered it here:

https://en.cppreference.com/w/cpp/numeric/complex/operator_ltltgtgt

You need to input it as (num,num). 

Chapter 24 // Drill 6 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 24 // Drill 6

Compute a multiplication table for [0,n) * [0, m) and represent it as a 2D Matrix. Take n and m from cin and print out the table nicely (assume that m is small enough that the results fit on a line).

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2024/Drills/Drill%206

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Chapter 24 // Drill 5 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 24 // Drill 5

Read ten floating-point values from input and put them into a Matrix<double>. Matrix has no push_back() so be careful to handle an attempt to enter a wrong number of doubles. Print out the Matrix.

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2024/Drills/Drill%205

The accompanying MatixIO.h file provides very simple I/O for 1D and 2D matrices. So

Matrix<double> a(4);

cin >> a;

cout << a;

Will read 4 whitespace-seperate doubles delimited by curly braces. For example with a 1D matrix:

{ 1.2 3.4 5.6 7.8 }

These functions will handle reading in the correct amount of numbers and throw errors if the structure isn't exact.

I also added my own method for fun.

Chapter 24 // Drill 4 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 24 // Drill 4

Write a program that takes ints from cin and outputs the sqrt() of each int, or "no square root" if sqrt(x) is illegal for some x (i.e., check your sqrt() return values).

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2024/Drills/Drill%204

So the std::sqrt function is explained here:

https://en.cppreference.com/w/cpp/numeric/math/sqrt

I didn't realise it returned floats, doubles or long doubles. It returns some error handles if something goes wrong defined here:

https://en.cppreference.com/w/cpp/numeric/math/math_errhandling

Chapter 24 // Drills 1, 2, 3 - Principles & Practice Using C++

In this exercise I am using Visual Studio 2019 and a modified version of the std_lib_facilities header found here.

Chapter 24 // Drill 1

Print the size of a char, a short, an int, a long, a float, a double, an int*, and a double* (use sizeof, not <limits>).

Chapter 24 // Drill 2

Print out the size as reported by sizeof of Matrix<int> a(10), Matrix<int> b(100), Matrix<double> c(10), Matrix<int, 2> d(10,10), Matrix<int, 3> e(10,10,10).

Chapter 24 // Drill 3

Print out the number of elements of each of the Matrixes from 2.

Github: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2024/Drills/Drills%201%2C2%2C3

Dear god, reading this chapter almost sent me to sleep several times...there's just something about matrices that bores the shit out of me.

Matrix.h is a file made up by Bjarne. You can find a copy of it in here:

https://www.stroustrup.com/Programming/PPP2code.tar

or here:

https://github.com/l-paz91/principles-practice/tree/master/Matrix%20Files

The ones with 11 on them I think are for the second edition of the book??