Assignment statement used in conditional operators

Question

Can anybody please tell me why this statement is giving an error - Lvalue Required

(a>b?g=a:g=b); 

but this one is correct

Answer 1

The expression:

(a>b?g=a:g=b)

parsed as:

(a>b?g=a:g)=b 

And we can't assign to an expression so its l-value error.

Read: Conditional operator differences between C and C++ Charles Bailey's answer:

Grammar for ?: is as follows:

conditional-expression:
    logical-OR-expression
    logical-OR-expression ? expression : conditional-expression

This means that a ? b : c = d parses as (a ? b : c) = d even though (due to the 'not an l-value' rule) this can't result in a valid expression.

One side note:

Please keep space in you expression so that it become readable for example.

(a>b?g=a:g=b);

Should be written as:

(a > b? g = a: g = b);

similarly, you should add space after ; and ,.