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C PROGRAMMING PROGRAM • STRUCTURES, UNIONS & ENUMS

Represent Weekdays Using an enum

Learn how to represent weekdays using an enum using a clear C program.

BeginnerenumNamed constantsswitch

PROBLEM UNDERSTANDING

Input and expected output

Sample input
No input required
Sample output
Weekday number = 5

COMPLETE C PROGRAM

Complete C implementation

enum-weekday.c
Open in compiler
#include <stdio.h>

enum Weekday { MONDAY = 1, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY };

int main(void)
{
    enum Weekday today = FRIDAY;
    switch (today) {
        case MONDAY: case TUESDAY: case WEDNESDAY: case THURSDAY: case FRIDAY:
            printf("Weekday number = %d\n", today); break;
        case SATURDAY: case SUNDAY: puts("It is the weekend."); break;
    }
    return 0;
}

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

Select Start to walk through the important lines.

SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

Weekday number = 5
0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Read the required input values.
  2. Use meaningful enum names instead of unexplained integer constants.
  3. Display the computed result.

Use meaningful enum names instead of unexplained integer constants.

EFFICIENCY

Time and space complexity

Time complexity

O(1)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

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Use the correct format specifier for every variable.

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Initialize variables before using their values.

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Check braces, semicolons and input order carefully.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.