Introduction Event Calendar Implement a menu-driven event calendar that can be u
ID: 3666003 • Letter: I
Question
Introduction
Event Calendar
Implement a menu-driven event calendar that can be used to view a monthly calendar, view the events planned on any given day, add an event, and delete an event. In addition, the program will allow the event calendar to be persisted to secondary storage.
Program Flow
The program will provide at least the following menu options: Menu:
1. Display Calendar
2. Display A Day's Events 3. Display All Events
4. Add Event
5. Delete Event
6. Exit
1. Display Calendar – the calendar displayed will be the current month’s calendar in the following format:
JAN 2016
SUN MON TUE WED THU FRI SAT
12 3456789 10 11 12* 13 14 15 16 17 18 19 20 21 22* 23
24 [25] 26 27* 28 29 30* 31
In the above output, [25] signifies today’s date and the dates with the asterisk signify that there is an event scheduled on that day.
2. Display A Day's Events – the user is given a prompt to enter a date. The calendar will then display all the events scheduled on that date. For example:
1/27/2016
C++ class – CSUEB – CS2370 class at CSUEB Interview – Apple – interview with Mike Morton
3. Display All Events – all events available in the calendar are displayed, organized by date
Design
The program should be based on the concepts of Object-Oriented Design. It should have at least the following 3 classes:
- Event
o An Event will have at least the following attributes: date, title,
description, location
- Date
o A Date will be able to hold at least the month, day, and year.
- Calendar
o The Calendar class will hold a Date and a list of Events. The Date will
be initialized with today’s date (ie. the date of the day that the program is executed). The events can be kept in a list container available in the C++ Standard Library header: <list>
Persistence can be achieved in any way you prefer. The simplest way would be to read a specific file upon program invocation and overwrite that same file before program exit. You only need to persist the list of events that the calendar is holding. When the user chooses to exit the program, you can fetch the list of events from the calendar object and write each event out to the file before program exit. Then, when the user chooses to run the program again, it will read that same file (or preferably ask the user for a filename to read), read each event from the file, and add each event to the calendar as it’s read.
Explanation / Answer
#include<stdio.h>
#include<conio.h>
#include<windows.h>
struct Date{
int dd;
int mm;
int yy;
};
struct Date date;
struct Remainder{
int dd;
int mm;
char note[50];
};
struct Remainder R;
COORD xy = {0, 0};
void gotoxy (int x, int y)
{
xy.X = x; xy.Y = y; // X and Y coordinates
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), xy);
}
//This will set the forground color for printing in a console window.
void SetColor(int ForgC)
{
WORD wColor;
//We will need this handle to get the current background attribute
HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO csbi;
//We use csbi for the wAttributes word.
if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
{
//Mask out all but the background attribute, and add in the forgournd color
wColor = (csbi.wAttributes & 0xF0) + (ForgC & 0x0F);
SetConsoleTextAttribute(hStdOut, wColor);
}
return;
}
void ClearColor(){
SetColor(15);
}
void ClearConsoleToColors(int ForgC, int BackC)
{
WORD wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);
//Get the handle to the current output buffer...
HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
//This is used to reset the carat/cursor to the top left.
COORD coord = {0, 0};
//A return value... indicating how many chars were written
// not used but we need to capture this since it will be
// written anyway (passing NULL causes an access violation).
DWORD count;
//This is a structure containing all of the console info
// it is used here to find the size of the console.
CONSOLE_SCREEN_BUFFER_INFO csbi;
//Here we will set the current color
SetConsoleTextAttribute(hStdOut, wColor);
if(GetConsoleScreenBufferInfo(hStdOut, &csbi))
{
//This fills the buffer with a given character (in this case 32=space).
FillConsoleOutputCharacter(hStdOut, (TCHAR) 32, csbi.dwSize.X * csbi.dwSize.Y, coord, &count);
FillConsoleOutputAttribute(hStdOut, csbi.wAttributes, csbi.dwSize.X * csbi.dwSize.Y, coord, &count );
//This will set our cursor position for the next print statement.
SetConsoleCursorPosition(hStdOut, coord);
}
return;
}
void SetColorAndBackground(int ForgC, int BackC)
{
WORD wColor = ((BackC & 0x0F) << 4) + (ForgC & 0x0F);;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), wColor);
return;
}
int check_leapYear(int year){ //checks whether the year passed is leap year or not
if(year % 400 == 0 || (year % 100!=0 && year % 4 ==0))
return 1;
return 0;
}
void increase_month(int *mm, int *yy){ //increase the month by one
++*mm;
if(*mm > 12){
++*yy;
*mm = *mm - 12;
}
}
void decrease_month(int *mm, int *yy){ //decrease the month by one
--*mm;
if(*mm < 1){
--*yy;
if(*yy<1600){
printf("No record available");
return;
}
*mm = *mm + 12;
}
}
int getNumberOfDays(int month,int year){ //returns the number of days in given month
switch(month){ //and year
case 1 : return(31);
case 2 : if(check_leapYear(year)==1)
return(29);
else
return(28);
case 3 : return(31);
case 4 : return(30);
case 5 : return(31);
case 6 : return(30);
case 7 : return(31);
case 8 : return(31);
case 9 : return(30);
case 10: return(31);
case 11: return(30);
case 12: return(31);
default: return(-1);
}
}
char *getName(int day){ //returns the name of the day
switch(day){
case 0 :return("Sunday");
case 1 :return("Monday");
case 2 :return("Tuesday");
case 3 :return("Wednesday");
case 4 :return("Thursday");
case 5 :return("Friday");
case 6 :return("Saturday");
default:return("Error in getName() module.Invalid argument passed");
}
}
void print_date(int mm, int yy){ //prints the name of month and year
printf("--------------------------- ");
gotoxy(25,6);
switch(mm){
case 1: printf("January"); break;
case 2: printf("February"); break;
case 3: printf("March"); break;
case 4: printf("April"); break;
case 5: printf("May"); break;
case 6: printf("June"); break;
case 7: printf("July"); break;
case 8: printf("August"); break;
case 9: printf("September"); break;
case 10: printf("October"); break;
case 11: printf("November"); break;
case 12: printf("December"); break;
}
printf(" , %d", yy);
gotoxy(20,7);
printf("---------------------------");
}
int getDayNumber(int day,int mon,int year){ //retuns the day number
int res = 0, t1, t2, y = year;
year = year - 1600;
while(year >= 100){
res = res + 5;
year = year - 100;
}
res = (res % 7);
t1 = ((year - 1) / 4);
t2 = (year-1)-t1;
t1 = (t1*2)+t2;
t1 = (t1%7);
res = res + t1;
res = res%7;
t2 = 0;
for(t1 = 1;t1 < mon; t1++){
t2 += getNumberOfDays(t1,y);
}
t2 = t2 + day;
t2 = t2 % 7;
res = res + t2;
res = res % 7;
if(y > 2000)
res = res + 1;
res = res % 7;
return res;
}
char *getDay(int dd,int mm,int yy){
int day;
if(!(mm>=1 && mm<=12)){
return("Invalid month value");
}
if(!(dd>=1 && dd<=getNumberOfDays(mm,yy))){
return("Invalid date");
}
if(yy>=1600){
day = getDayNumber(dd,mm,yy);
day = day%7;
return(getName(day));
}else{
return("Please give year more than 1600");
}
}
int checkNote(int dd, int mm){
FILE *fp;
fp = fopen("note.dat","rb");
if(fp == NULL){
printf("Error in Opening the file");
}
while(fread(&R,sizeof(R),1,fp) == 1){
if(R.dd == dd && R.mm == mm){
fclose(fp);
return 1;
}
}
fclose(fp);
return 0;
}
void printMonth(int mon,int year,int x,int y){ //prints the month with all days
int nod, day, cnt, d = 1, x1 = x, y1 = y, isNote = 0;
if(!(mon>=1 && mon<=12)){
printf("INVALID MONTH");
getch();
return;
}
if(!(year>=1600)){
printf("INVALID YEAR");
getch();
return;
}
gotoxy(20,y);
print_date(mon,year);
y += 3;
gotoxy(x,y);
printf("S M T W T F S ");
y++;
nod = getNumberOfDays(mon,year);
day = getDayNumber(d,mon,year);
switch(day){ //locates the starting day in calender
case 0 :
x=x;
cnt=1;
break;
case 1 :
x=x+4;
cnt=2;
break;
case 2 :
x=x+8;
cnt=3;
break;
case 3 :
x=x+12;
cnt=4;
break;
case 4 :
x=x+16;
cnt=5;
break;
case 5 :
x=x+20;
cnt=6;
break;
case 6 :
x=x+24;
cnt=7;
break;
default :
printf("INVALID DATA FROM THE getOddNumber()MODULE");
return;
}
gotoxy(x,y);
if(cnt == 1){
SetColor(12);
}
if(checkNote(d,mon)==1){
SetColorAndBackground(15,12);
}
printf("%02d",d);
SetColorAndBackground(15,1);
for(d=2;d<=nod;d++){
if(cnt%7==0){
y++;
cnt=0;
x=x1-4;
}
x = x+4;
cnt++;
gotoxy(x,y);
if(cnt==1){
SetColor(12);
}else{
ClearColor();
}
if(checkNote(d,mon)==1){
SetColorAndBackground(15,12);
}
printf("%02d",d);
SetColorAndBackground(15,1);
}
gotoxy(8, y+2);
SetColor(14);
printf("Press 'n' to Next, Press 'p' to Previous and 'q' to Quit");
gotoxy(8,y+3);
printf("Red Background indicates the NOTE, Press 's' to see note: ");
ClearColor();
}
void AddNote(){
FILE *fp;
fp = fopen("note.dat","ab+");
system("cls");
gotoxy(5,7);
printf("Enter the date(DD/MM): ");
scanf("%d%d",&R.dd, &R.mm);
gotoxy(5,8);
printf("Enter the Note(50 character max): ");
fflush(stdin);
scanf("%[^ ]",R.note);
if(fwrite(&R,sizeof(R),1,fp)){
gotoxy(5,12);
puts("Note is saved sucessfully");
fclose(fp);
}else{
gotoxy(5,12);
SetColor(12);
puts("Fail to save!!");
ClearColor();
}
gotoxy(5,15);
printf("Press any key............");
getch();
fclose(fp);
}
void showNote(int mm){
FILE *fp;
int i = 0, isFound = 0;
system("cls");
fp = fopen("note.dat","rb");
if(fp == NULL){
printf("Error in opening the file");
}
while(fread(&R,sizeof(R),1,fp) == 1){
if(R.mm == mm){
gotoxy(10,5+i);
printf("Note %d Day = %d: %s", i+1, R.dd, R.note);
isFound = 1;
i++;
}
}
if(isFound == 0){
gotoxy(10,5);
printf("This Month contains no note");
}
gotoxy(10,7+i);
printf("Press any key to back.......");
getch();
}
int main(){
ClearConsoleToColors(15, 1);
SetConsoleTitle("Calender Project - Programming-technique.blogspot.com");
int choice;
char ch = 'a';
while(1){
system("cls");
printf("1. Find Out the Day ");
printf("2. Print all the day of month ");
printf("3. Add Note ");
printf("4. EXIT ");
printf("ENTER YOUR CHOICE : ");
scanf("%d",&choice);
system("cls");
switch(choice){
case 1:
printf("Enter date (DD MM YYYY) : ");
scanf("%d %d %d",&date.dd,&date.mm,&date.yy);
printf("Day is : %s",getDay(date.dd,date.mm,date.yy));
printf(" Press any key to continue......");
getch();
break;
case 2 :
printf("Enter month and year (MM YYYY) : ");
scanf("%d %d",&date.mm,&date.yy);
system("cls");
while(ch!='q'){
printMonth(date.mm,date.yy,20,5);
ch = getch();
if(ch == 'n'){
increase_month(&date.mm,&date.yy);
system("cls");
printMonth(date.mm,date.yy,20,5);
}else if(ch == 'p'){
decrease_month(&date.mm,&date.yy);
system("cls");
printMonth(date.mm,date.yy,20,5);
}else if(ch == 's'){
showNote(date.mm);
system("cls");
}
}
break;
case 3:
AddNote();
break;
case 4 :
exit(0);
}
}
return 0;
}
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