AMS 595 C++ code from the lectures

How to build & run

Below is the easiest way to build a C++ source file from this repo

g++ -std=c++11 my_code.cpp -o my_executable

Below is how to let the compiler warn you about potential mistakes in your code

g++ -Wall -Wextra -std=c++11 my_code.cpp -o my_executable

Below is how to tell the compiler to choose an optimization level

g++ -std=c++11 -O0 my_code.cpp -o my_executable

Levels of optimization for GCC/G++:

• -O0: No optimization (useful for debugging)
• -O1: Optimize something
• -O2: Optimize more (recommended, usually safe)
• -O3: Turn on aggressive optimizations (may not be faster, and may cause errors)
• -Ofast: Highest level of optimization (almost never worth it)

To run the compiled code, use

./my_executable

Other useful compiler options will be added later

Install GCC/G++ on macOS

1. Open Terminal.app, you can search for it in the Spotlight Search

2. Go to Homebrew Website in your browser, follow the instructions to install homebrew

3. Once it is installed, first use brew update to make sure it has the latest package database

4. Finally, use brew install gcc to install GCC, which contains the C++ compiler g++

5. Now you should be able to compile C++ source code with the command g++-9 -std=c++11 foo.cpp -o foo. Note that the command g++ also works but it is NOT the real GNU compiler.

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