For an expression involving a variable, the expression tree inlines the expression tree of the expression in which that variable was assigned a value.
The expression tree of an expression involving a variable inlines the variable's definition
The expression tree of an expression involving a variable shows a node for that variable
CorrectionHere is what's right.
The expression tree represents a syntactic decomposition of an expression (a parse tree, or abstract syntax tree, of the expression). How the value of a variable was computed is not visible in an expression tree showing a read access of that variable.
int v = 1 + 2; int result = v + 4;
v + 4 should consist of only three nodes: ”+”, “v”, and “4”. Students holding this misconception will inline the expression used to assign a value to
v, and thus draw an expression tree involving 5 nodes: ”+”, ”+”, “1”, “2”, and “4”.