C Preprocessor - Programming

C Preprocessor - General Questions
C Preprocessor - Find Output of Program
C Preprocessor - Point Out Errors
C Preprocessor - Point Out Correct Statements
C Preprocessor - True / False Questions
C Preprocessor - Yes / No Questions

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

ANS:A - It compiles

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

C Preprocessor - Programming

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; }`

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C Preprocessor - Programming

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; }

Solution

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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; }`

For help Students Orientation
Mcqs Questions