Compiling the Program
gcc <input.c> -o output -Wall
g++ <input.c> -o output -Wall
Note that attempting to compile a C++ file with gcc will fail with undefined reference to `__gxx_personality_v0'
-Wall turns on all compiler warnings, It is not necessary, but often useful to catch silly mistakes in the code.
- char: 8 bits in C/C++, 16 bits in Java
- int: 32 bits
- long: 32 bits in C/C++, 64 bit in Java
- long long: 64 bits in C/C++, GCC only. (__int64 in Microsoft C++)
An n-bit signed integer can represent values int the range [-2n-1, 2n-1 - 1].
An unsigned integer can represent values in the range [0, 2n - 1] (Not available in Java)
Values are represented in 2's complement (mod 2n) during overflow.
Division rounds towards 0
- (-5) / 3 = -1
- 7 / 3 = 2
- 1 / 2 = 0
Java has BigInteger
- This is slow, but infinitely precise.