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Day of the week(2002)

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Submitted on: 2/17/2002 6:36:12 AM
By: manish soni 
Level: Beginner
User Rating: By 3 Users
Compatibility:C, C++ (general), Borland C++

Users have accessed this code 399 times.
 
 
     Its a simple program which calculates the day of the week for any given date & month of the year 2002.
 

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//**************************************
//     
//INCLUDE files for :Day of the week(200
//     2)
//**************************************
//     
#include<stdio.h> 
#include<conio.h> 
#include<iostream.h>
code:
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By using this code, you agree to the following terms...   
1) You may use this code in your own programs (and may compile it into a program and distribute it in compiled format for langauges that allow it) freely and with no charge.   
2) You MAY NOT redistribute this code (for example to a web site) without written permission from the original author. Failure to do so is a violation of copyright laws.   
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4) You will abide by any additional copyright restrictions which the author may have placed in the code or code's description.

//**************************************
//     
// Name: Day of the week(2002)
// Description:Its a simple program whic
//     h calculates the day of the week for any
//     given date & month of the year 2002.
// By: manish soni
//
// Inputs:Name & date of the month for t
//     he year 2002.
//
// Returns:It returns the "day of the we
//     ek" for the given month & date of the ye
//     ar 2002.
//
// Assumes:The logic is explained clearl
//     y in the program.With it even u can find
//     out the day of the week for any year.
Its calculated using a "key number" for a month.This can be understood from the "comment statements" in the program.
So go & find out the "trick" & then you can impress all your friends by telling them the "day of the week" for any month & date of yhe year.
do not forget to rate my progarm.
//
// Side Effects:Nill.
//
//This code is copyrighted and has// limited warranties.Please see http://
//     www.Planet-Source-Code.com/xq/ASP/txtCod
//     eId.3322/lngWId.3/qx/vb/scripts/ShowCode
//     .htm//for details.//**************************************
//     

/*
Name: Manish soni.
E-Mail: manish_99us@yahoo.com
Language: C++
Category: Miscellaneous.
Description: Its a simple program which calculates the day of the week for any given date & month of the year 2002.
*/
#include<stdio.h> //include files.
#include<conio.h> 
#include<iostream.h> 
void main() //main function definition.
    { 
    int opt,date,day;//variable declaration.
    char b; 
    cout<<"****A program to find out the day of the week for any date of the year 2002****\n\n"; 
    cout<<"1.January\n2.February\n3.March\n4.April\n5.May\n6.June\n7.july\n8.August\n9.September\n10.October\n11.November\n12.December\n"; 
    a: cout<<"\nEnter the value of the month:"; 
    cin>>opt; 
    cout<<"\nEnter the date of the month:"; 
    cin>>date; 
    /*Calculates the value of the variable 'day'.
    this will be the final result based on which the "day of the week" is calculated.
    day= ((month number + date of the month)%number of days in a week);
    month number is as follows:
    "6" if the 1st day of the month is "sunday".
    "7" if the 1st day of the month is "monday".
    "8" if the 1st day of the month is "tuesday".
    "9" if the 1st day of the month is "wednesday".
    "10" if the 1st day of the month is "thursday".
    "11" if the 1st day of the month is "friday".
    "12" if the 1st day of the month is "saturday".
    */
    switch(opt) 
        { 
        case 1: if(date<=31) 
            {day=(8+date)%7;} 
            else
            cout<<"\nFor u'r kind information january has only 31 days.\n"; 
            break; 
            case 2: if(date<=28) 
                {day=(11+date)%7;} 
                else 
                cout<<"\nFor u'r kind information february has only 28 days.\n"; 
                break; 
                case 3: if(date<=31) 
                    {day=(11+date)%7;} 
                    else 
                    cout<<"\nFor u'r kind information march has only 31 days.\n"; 
                    break; 
                    case 4: if(date<=30) 
                        {day=(7+date)%7;} 
                        else 
                        cout<<"\nFor u'r kind information april has only 30 days.\n"; 
                        break; 
                        case 5: if(date<=31) 
                            {day=(9+date)%7;} 
                            else 
                            cout<<"\nFor u'r kind information may has only 31 days.\n"; 
                            break; 
                            case 6: if(date<=30) 
                                {day=(12+date)%7;} 
                                else 
                                cout<<"\nFor u'r kind information june has only 30 days.\n"; 
                                break; 
                                case 7: if(date<=31) 
                                    {day=(7+date)%7;} 
                                    else 
                                    cout<<"\nFor u'r kind information july has only 31 days.\n"; 
                                    break; 
                                    case 8: if(date<=31) 
                                        {day=(10+date)%7;} 
                                        else 
                                        cout<<"\nFor u'r kind information august has only 31 days.\n"; 
                                        break;
                                        case 9: if(date<=30) 
                                            {day=(6+date)%7;} 
                                            else 
                                            cout<<"\nFor u'r kind information september has only 30 days.\n"; 
                                            break; 
                                            case 10: if(date<=31) 
                                                {day=(8+date)%7;} 
                                                else 
                                                cout<<"\nFor u'r kind information october has only 31 days.\n"; 
                                                break; 
                                                case 11: if(date<=30) 
                                                    {day=(11+date)%7;} 
                                                    else 
                                                    cout<<"\nFor u'r kind information november has only 30 days.\n"; 
                                                    break; 
                                                    case 12: if(date<=31) 
                                                        {day=(6+date)%7;} 
                                                        else 
                                                        cout<<"\nFor u'r kind information december has only 31 days.\n"; 
                                                        break; 
                                                    } 

/* The value of the variable 'day' calculated above is checked for the conditions: if (day==0) then the day of the week is "sunday". if (day==1) then the day of the week is "monday". if (day==2) then the day of the week is "tuesday". if (day==3) then the day of the week is "wednesday". if (day==4) then the day of the week is "thursday". if (day==5) then the day of the week is "friday". if (day==6) then the day of the week is "saturday". */ if(day==0) {cout<<"\nIts SUNDAY.\n";} if(day==1) {cout<<"\nIts MONDAY.\n";} if(day==2) {cout<<"\nIts TUESDAY.\n";} if(day==3) {cout<<"\nIts WEDNESDAY.\n";} if(day==4) {cout<<"\nIts THURSDAY.\n";} if(day==5) {cout<<"\nIts FRIDAY.\n";} if(day==6) {cout<<"\nIts SATURDAY.\n";} cout<<"\n****************************************************\n"; cout<<"\nWould u like to continue?[y/n]:"; cin>>b; if(b=='y'||b== 'Y') goto a; else getch(); getch(); }

 
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