“l-value required” error

Question

When do we get \"l-value required\" error...while compiling C++ program???(i am using VC++ )

Answer 1

R Value is an expression that always appear on right side of an assignment operator Eg:

int a = 5;//here 5 is Rvalue

L Value is an expression that can either come on left or right side of an assignment.When it is in on left side it refers to a place that can hold a value.

Here a in expression a = 5 is L Value

and when appearing on right side value is read from the L Value. Since R value which does not have capability to locate any memory it cannot hold any value like LValue so

5 = 6 or 5 = a

will be compiler error.