C++ programs Examples

On this repository you can find some basic examples in C++

History

I started this repository when I attended the course C++ for C Programmers. Then, I decided use this as a quick reference when need to use some features that are normally confused, like pointers, lists, casting, etc.

Organization

Each subdirectory has one or more source codes, someone has C and C++ files to show differences between them.

How to compile and run

Compile

Just use g++ <source file>.cpp -o <executable> To generate debug information, just use -g option

Run

./<executable>

lldb ./<executable> To debug

Source codes

Assign

Some basic differences between C and C++

• Files
  • assign1.c
  • assign1.cpp
• Subjects
  • Comments
  • <iostream> and namespace
  • <vector>
  • const instead define
  • inline

CSV Reader

A simple program to read a CSV file

• File
  • csv-reader.cpp
• Subjects
  • getline
  • string::find()
  • string::substr()

Dynamic Array

Create multidimensional arrays dynamicaly

• File
  • dyn-array.cpp
• Subjects
  • new and delete chuncks of memory
  • pointers to array

Enum

Enum examples using C++ 11

• File
  • enum.cpp
• Subjects
  • Enumeration
  • Scope

Graphs

Some algorithms of Graph Theory

connected.app gives an example to find connected components in a undirected graph. Based on source find on http://www.geeksforgeeks.org/connected-components-in-an-undirected-graph/

• Files
  • connected.cpp
• Subjects
  • Graph Theory
  • lists

Inheritance

• Basic examples of inheritance:

  • Shape -> Rectangle -> Square
  • Shape -> Triangle

• File

  • inheritance.cpp

• Subjects

  • Inheritance
  • Derived classes
  • Constructors

Inner block

Shows the "value" of a variable inside a block

• File
  • innerblock.c

IO Example

A very simple examples of IO: read and write files, cin and cout

• Files
  • ioexample.cpp
  • readFile.cpp
• Subjects
  • namespace std
  • cout
  • cin
  • ifstream
  • ofstream

List

Chaining list`

• File
  • list.cpp
• Subjects
  • constructor
  • destructor
  • memory allocation
  • pointers

Main Parameters

Processing parameters passing by commamnd line

Some simple instrcutions on how to parse command line options

Found tips on Stack Overflow

• File

  • mainParameters.cpp

• Subjects

  • argv, argc
  • Command line Options, Parameters

Point Class

These examples use classes to store multidimensional points. Using overloading to allow basic operations with points as display, add and multiply

The pointAtt.cpp file shows classes inheritence, including a new attribute on the new Class derived from Point Class

Here there is an example on how separate header and implementation files of a Class

to run just execute g++ main.cpp point.cpp -o main -std=c++11 include option -g to debug

Or you can run make to compile and generate executable file main

• Files
  • point.h
  • point.cpp
  • pointAtt.cpp
  • main.cpp
  • Makefile
• Subjects
  • Classes
  • ostream
  • Operators overloading
  • Dynamic allocation
  • <vector>
  • Inheritance
  • Makefile

STL - Standard Template Library

Examples on how to use STL

• Files

  • square.cpp

• Subjects

  • Iterator - See square.cpp to see how to iterate a vector

Template

Use of template. You don't need to worry about convertions

• Files
  • copyVector.cpp
  • template.cpp
• Subjects
  • template
  • Casting

Type def

Example of how to define a varible type.

• File
  • typedef.cpp
• Subjects
  • `typedef'
  • template
  • Casting
  • Operators overloading

Two functions, same name

This example shows how to use two functions with same name. The only difference is the parameters types.

• Files
  • swap.c
  • swap.cpp
• Subjects
  • inline
  • Use two different functions with same name

Vector

Some examples to show how to use vectors

• Files
  • vectorArg.cpp - Show how to pass vector as an argument
• Subjects
  • Vector as an arguments
  • vector::push_back()
  • vector::size()