what will the swap macro in following program be expanded to on..., C Preprocessor, Adv C

Question:What will the SWAP macro in the following program be expanded to on preprocessing? will the code compile?#include<stdio.h>
#define SWAP(a, b, c)(c t; t=a, a=b, b=t)
int main()
{
    int x=10, y=20;
    SWAP(x, y, int);
    printf("%d %d\n", x, y);
    return 0;
}

A It compiles 
B Compiles with an warning 
C Not compile 
D Compiles and print nothing

+ AnswerC

+ ExplanationThe code won't compile since declaration of t cannot occur within parenthesis.

+ Report

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Question:What will the SWAP macro in the following program be expanded to on preprocessing? will the code compile?#include<stdio.h> #define SWAP(a, b, c)(c t; t=a, a=b, b=t) int main() { int x=10, y=20; SWAP(x, y, int); printf("%d %d\n", x, y); return 0; }

A It compiles

B Compiles with an warning

C Not compile

D Compiles and print nothing

C

Question:What will the SWAP macro in the following program be expanded to on preprocessing? will the code compile?
#include<stdio.h> #define SWAP(a, b, c)(c t; t=a, a=b, b=t) int main() { int x=10, y=20; SWAP(x, y, int); printf("%d %d\n", x, y); return 0; }