C++ Review

The chart below provides an overview of the compilation process:

NEVER CONFUSE COMPILATION OF YOUR C++ PROGRAM...

WITH EXECUTION OF YOUR C++ PROGRAM...

Benefits of high-level languages (like C++):
• (Relatively) easy to read and write (for humans)
• Portability!!!
  

Variables

Every C++ variable has :
• a name (ultimately the name corresponds to the memory address of the variable)
• a type (which determines the number of memory cells needed for the variables... and how the data in those cells is interpreted)
• a value (the contents of the memory cells used for the variable, interpreted according to the variable's type)

What's going on?

Consider the C++ source code bits.cpp.

I compiled this code with g++ on a PC. A run of the resulting executable produces:

01000000010010001111010111000011
3.14
3.14
1078523331
sizeof(float) 4
sizeof(int) 4

Then I compiled the exact same code with g++ on a Sparc. A run of the resulting executable produces:

11000011111101010100100001000000
3.14
3.14
1078523331
sizeof(float) 4
sizeof(int) 4

Q: What variable types do you remember?

Some C++ topics you should be familiar with:
• I/O
• Relational operators
• Boolean operators
• (?? Bitwise operators ??)
• Rules of precedence
• Flow of control
• Functions
• Arrays
• Structures and classes
• Pointer basics