By Bruce Sutherland
C++ Recipes: A Problem-Solution procedure is a convenient code cookbook reference consultant that conceal the most recent C++ 14 in addition to the various code templates on hand within the most recent average Template Library (STL).
In this useful reference, you'll locate numbers, strings, dates, instances, sessions, exceptions, streams, flows, guidelines and extra. additionally, you'll see a number of code samples, templates for C++ algorithms, parallel processing, multithreading and numerical procedures. those have many functions together with online game improvement, monstrous facts analytics, monetary engineering and research, company functions and extra. A wealth of STL templates on functionality gadgets, adapters, allocators, and extensions also are available.
This is a "must have", modern reference on your technical library.
What you’ll learn
How to address numbers, strings, textual content, dates and occasions, and knowledge in general
How to enforce quite a few C++ algorithms
How to deal with and use sessions, exceptions, streams and flows
How to construct parallel processing C++ templates
How to code for pointers
How to leverage the wealth of C++ templates present in the STL, together with functionality items, adapters, allocators and more
How to increase the STL and more
Who this publication is for
This booklet is for people with at the least a few event with C++ and positively event with programming in general.
Table of Contents
Working with Text
Working with Numbers
The STL Containers
The STL Algorithms
3D images Programming
Read Online or Download C++ Recipes: A Problem-Solution Approach PDF
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Extra info for C++ Recipes: A Problem-Solution Approach
Using a shared_ptr Using a weak_ptr Modern C++ also allows you to hold weak references to smart pointers. This allows you to get a reference to a pointer to a shared object temporarily while you need it for as long as the shared object exists. Listing 2-36 shows how you can achieve this using a weak_ptr. Listing 2-36. " << endl; } return 0; } You can see in Listing 2-36 that a weak_ptr can be assigned a shared_ptr however you cannot access the shared object directly through the weak pointer. Instead a weak pointer supplies a lock method.
The lambda function used to print the values from myCopy can now only be used with the type defined by MyVector::value_type whereas the C++14 version could have been reused with any type that could be passed as input to cout. It goes without saying that none of this code will compile with a C++98 compiler as C++98 does not support lambda functions. 39 Chapter 2 ■ Modern C++ Recipe 2-7. Working with Time Problem You would like to write portable programs that are aware of the current time or their execution time.
The lock method always returns a shared_ptr however the shared_ptr returned by lock will fail an if test if the object no longer exists. You can see this at the end of the main function where lock is called after the object has been deleted. Figure 2-14 shows that the weak_ptr cannot get a valid shared_ptr after this has occurred. Figure 2-14. A weak_ptr Failing to lock a Deleted Object 58 Chapter 3 Working with Text Working with text will be one of the most regular tasks a C++ programmer will have to deal with.