Why in Turbo C compiler sizeof(int) is 2 bytes and in gcc Linux compiler is 4 byte?

Question

Why in Turbo C compiler sizeof(int) is 2 bytes and in gcc Linux compiler is of 4 bytes?

Answer 1

sizeof(int) is not a constant across all platforms.

It varies from system to system.

PS: Only sizeof object which is constant across all platforms is sizeof(char)