Data type ranges (order of magnitude)

CPP file, prints data ranges for different data types. Compile with g++ Printlimits.cpp -o Printlimits -lm

Integers

Found in /usr/include/limits.h Source

Bits	range signed	Unsigned
8	-128 to +127	0 to +255
16	-32.768 to +32.767	0 to +65.535
32	-2,14e9 to +2,14e9	0 to +4,3e9
64	-9,22e18 to +9,22e18	0 to +18,44e18

Floating types

On Ubuntu (64 bit) float.h is located in /usr/lib/gcc/x86_64-linux-gnu/4.2/include

Useful functions:

• std::numeric_limits::max()
• std::numeric_limits::max()

Type	Min	Max	epsilon
Float	1.17549e-38	3.40282e+38	1.19209e-07
Double	2.22507e-308	1.79769e+308	2.22045e-16