C++ long and int type

On major 32-bit platforms:

• int is 32 bits
• long is 32 bits as well
• long long is 64 bits

On major 64-bit platforms:

• int is 32 bits
• long is either 32 or 64 bits
• long long is 64 bits as well

Going by the standard:

• int must be at least 16 bits
• long must be at least 32 bits
• long long must be at least 64 bits