Discussion
What will be the output of the program?
#include <stdio.h>
int main()
{
enum color{red, green, blue};
typedef enum color mycolor;
mycolor m = red;
printf("%d", m);
return 0;
}
Answer: D
Correct answer: 0
Enumerators are numbered from zero unless given explicit values, so red is 0, green 1 and blue 2. An enumeration constant has integer type, so %d prints the numeric value rather than the name - C keeps no run-time record of the identifier. Printing red would require an array of strings indexed by the enumerator.
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