Compiler Design Question

$\text{Consider the following ANSI C code:}$
int main(){
Integer x;
return 0;
}


$\text{What will be the type of error?}$

$\text{a) Lexical}$,

$\text{b) Syntax}$,

$\text{c) Semantic}$,

$\text{d) None}$ $\tag {GATE-CS 2021}$

According to me, Syntax Analysis phase should detect the error as there is no grammar in C which produces Integer x or in tokenized form id id. Any help is appreciated. :)

Your statement Integer x; is syntactically identifier identifier; which is a perfectly fine variable declaration. Semantically, the first identifier must be defined as a type, and the second identifier must not be defined as a variable in the same scope. The first condition fails, therefore ...

And you might want to download a copy of the C Standard to check if int main() is acceptable, or whether it must be int main(void), which is preferable and might be required.

StackExchange Computer Science Q#135954, answer score: 4