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Exercise

"Everything should be made as simple as possible, but not simpler."
- Albert Einstein

C Programming - C Preprocessor

@ : Home > C Programming > C Preprocessor > General Questions
1. 

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
2. 

In which stage the following code
#include<stdio.h>
gets replaced by the contents of the file stdio.h
A. During editingB. During linking
C. During executionD.
During preprocessing

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