C++ Crash Crash Course

Day 1

main function

g++ source1.cpp -o program1

Paths, . and .. in navigating directories

data type - memory, binary

declare variables (int, char, string as series of chars)

statements end with semicolon

cstdio library include

calling a function - printf

if condition block else block (example: do something different based on argc)

for loop - 3 statements (initialiser, condition, post-loop advancement) and a code block

Homework: study "while" loop and "switch" statement

Day 2

While loop - condition and 1 code block.

Do while loop - code block then condition.

While loop = for loop with empty initialiser/advancement statements

Switch - match expression's result to case label

Switch vs if-else differences.

your own function

calling with parameters copied as separate set of var values in function

classes as blueprints.

complex var data type - instances of a class all have the same set of fields

the "." field accessor (var1.func1() etc)

each instance have it's own separate memory for storing data.

Example code - fibonacci sequence.

Value overflow because not enough number of bits to represent large numbers.

Homework: implement factorial (1 to 20) calculator

Day 3

factorial printer - 2 approaches:

1. for-loop that goes 1 to 20 and each loop calls fact function and prints return.
2. for-loop that goes 1 to 20 and multiplies once each time and print.

set initial values of vars when declaring otherwise initial values are unpredictable