What is the meaning for you plus plus plus in c?

Answer 1

C++ was originally called "C with Classes". In the C language, '++' is an operator that increments the operand, thus C++ is a shorthand way of saying C=C+1. In this case the operand is the language name itself, C, thus C++ literally means the "the successor to C".

The ++ operator comes in two varieties: prefix and postfix increment. C++ is the postfix increment version, while ++C would be the prefix increment version. Both will increment the operand, C, however ++C evaluates to the original value of C while C++ evaluates to the incremented value of C. Which you use depends on whether you want the original value or the new value. Either way, C is incremented. Note that when working with an object named C, ++C is more efficient than C++ because C++ must copy the original object in order to return it, whereas ++C just returns the same object (pre-incremented). But with primitives that will fit into a register there is no difference as no copy is actually needed (the result is simply placed in an output register while a working register performs the actual increment).

Answer 2

There is no such operator as +++ in C. However, you may encounter the following:

int x=1;

int y=x+++1;

This is perfectly valid code, after which both x and y will be 2. However, it's not exactly clear why.

If we re-write the expression to show the correct operator precedence we can see what's really going on.

int x=1;

int y=(x++)+1;

So x++ (post increment operator) increments x making it 2, but returns 1, so y is assigned 1+1, therefore both x and y become 2.