Discussion
What will be the output of the following C code?
#include <stdio.h>
#define INDIA 1
#define US 2
#define CC US
main()
{
#if CC==INDIA
printf("Rupee");
#elif CC==US
printf("Dollar");
#else
printf("Euro");
#endif
}
Answer: C
Correct answer: Dollar
CC expands to US, which expands to 2 - expansions are rescanned. The first test 2 == 1 fails, the #elif test 2 == 2 succeeds, so printf("Dollar") is the only line that reaches the compiler.
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