Discussion
What will be the output of the following C code?
#include <stdio.h>
#define san 10
main()
{
#ifdef san
#define san 20
#endif
printf("%d",san);
}
Answer: B
Correct answer: 20
san is defined, so the #ifdef is true and the redefinition to 20 takes effect. By the time the preprocessor reaches the printf, san means 20, so 20 is printed.
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