How to use Enum in C?

Editorial Team — Mon, 02 Jan 2012 12:59:23 +0000

In C and C++, enum types can be used to set up collections of named integer constants. Consider a set of all days.

#define Sunday 0
#define Monday 1
#define Tuesday 2
#define Wednesday 3
#define Thursday 4
#define Friday 5
#define Saturday 6

The above lines can be replaced by:

enum AllDays{Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday};

Example program:

#include "stdio.h" 
int main()
{
	enum AllDays{Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday};

	AllDays aDay;
	int i = 0;
	printf("Please enter the day of the week (0 to 6)\n");
	scanf("%d",&i);
	aDay = AllDays(i);

	if(aDay == Sunday || aDay == Saturday)
	printf("It is weekend :) \n");
	else
	printf("It is not weekend :( \n");

	return 0;
}

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How to use Enum in C?