Constant variable initialization is yet another minute difference between C and C++. Consider the program given below.
int x = 111;
static int y = x;
if(x == y)
If you save the program as a C++ program, it compiles fine and shows the output as "Equal". But the same program when compiled as C will give you the following error "initializer element is not constant|". What is the reason? This is another minor difference between C and C++. In C a constant variable can only be initialized with a constant value and not by using another variable. But C++ do not have this restriction. You can initialize a constant variable with any other variable.
Click here to download the C++ program.