Question

A simple program in Java
Create a “Weekday calculator” for one month (e.g., for July 2019) in
Java that detects the weekday by the entered date (e.g., a user
inputs the date “19” and the program returns the result “The 19th of
July 2019 is Friday”)​

Answer 1

The program provided here is for the month of January 2021.

Program:

#include<iostream>

#include<string.h>

using namespace std;

int main()

{

int n;

string S[8] = {"","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};

cout<<"Weekday calculator for January 2021"<<endl;

int c = 5;            //because month of January 2021 starts with Friday

cout<<"Enter date : ";

cin>>n;

if(n>=1 && n<=31)

{

 for(int i=1;i<n;i++)

 {

  if(c==7)

  {

   c=1;

  }

  else

  {

   c++;

  }

 }

 cout<<"The "<<n<<"th of Janunary 2021 is "<<S[c];

}

else

{

 cout<<"Invalid date";

}

}