C differs from Java

C precedes Java, and isn't object-oriented:

• C doesn't have classes (C structs are a long way off), and no exception mechanism.
• program structure differs (see below)
• C has pointers (addresses) rather than references. These are more easily abused!
• C has no booleans: 0 == false, !0 == true.
• I/O is different
• A simple (single-file) C program is like a Java program where all methods are static