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Projects in C++ : Calendar display with add note and age finder in C

This project is coded in C using CodeBlock compiler it has around 540 lines of code , easy to understand for beginners in C language and can be used as semester project with some little modifications or upgradtions.

Features of the project

  1. Display the full view of calendar  
  2. Calendar months can be back and forth 
  3. User can add his/her note on any date 
  4. User can check the the time(clock) 
  5. User can find the at any given date
  6. User can find his age 
Enhancements if want to add some new features 
  1. You can add the alarm when the time matches to any of the note added my user 
  2. Alarm one or two days before , just to make it dynamic 
  3. You can also add the dates of the lunar months(islamic calendar)
  4. You can add the feature to wish the birth day of the user 
  5. Also you can tell the user about his/her star and put some phrases about the star and the users fate and fortune which tell user that how lucky you are in this month .
You can add many things , also you can convert this to OOP programming concepts and you can modify it multiple times. This is all your if you find some thing which need to be shared with others please do comment .


 #include <stdio.h>  
 #include <stdlib.h>  
 #include <time.h>  
 #include<conio.h>  
 #include<windows.h>  
 /**********************************************  
   Project: Calendar display with add note and age finder  
   Language : C  
   @Author : Awais Azam  
 ***********************************************/  
 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 = {5, 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 leapYearFeb(int year, int mon) {  
     int flag = 0;  
     if (year % 100 == 0) {  
         if (year % 400 == 0) {  
             if (mon == 2) {  
                 flag = 1;  
             }  
         }  
     } else if (year % 4 == 0) {  
         if (mon == 2) {  
             flag = 1;  
         }  
     }  
     return (flag);  
  }  
   void agefinder()  
 {  
     /* days in months */  
     int daysInMon[] = {31, 28, 31, 30, 31, 30,  
               31, 31, 30, 31, 30, 31};  
     int days, month, year;  
     char dob[200];  
     time_t ts;  
     struct tm *ct;  
     /* get the date of birth from the user */  
     printf("Enter your days of birth:");  
     fgets(dob, 100, stdin);  
     sscanf(dob, "%d/%d/%d", &days, &month, &year);  
     scanf(" %d/%d/%d",&days,&month,&year);  
     ts = time(NULL);  
     ct = localtime(&ts);  
     /* scan the year, month and year from the input string */  
     printf("Current Date: %d/%d/%d\n",  
         ct->tm_mday, ct->tm_mon + 1, ct->tm_year + 1900);  
     days = daysInMon[month - 1] - days + 1;  
     /* checking whether month is leap year feb - 29 days*/  
     if (leapYearFeb(year, month)) {  
         days = days + 1;  
     }  
     /* calculating the no of days, years and months */  
     days = days + ct->tm_mday;  
     month = (12 - month) + (ct->tm_mon);  
     year = (ct->tm_year + 1900) - year - 1;  
     /* checking for leap year feb - 29 days */  
     if (leapYearFeb((ct->tm_year + 1900), (ct->tm_mon + 1))) {  
         if (days >= (daysInMon[ct->tm_mon] + 1)) {  
             days = days - (daysInMon[ct->tm_mon] + 1);  
             month = month + 1;  
         }  
     } else if (days >= daysInMon[ct->tm_mon]) {  
         days = days - (daysInMon[ct->tm_mon]);  
         month = month + 1;  
     }  
     if (month >= 12) {  
         year = year + 1;  
         month = month - 12;  
     }  
     /* print the result */  
     printf("Age: %d year %d months and %d days\n", year, month, days);  
      printf("Press any key to go to Main menu\n");  
     getch();  
     return 0;  
  }  
 void datetime()  
 {  
   char c ='a';  
  while(c!='q')  
    {  
   system("cls");  
     if(kbhit())  
       c = getch();  
       time_t ts;  
     struct tm *ct;  
     ts = time(NULL);  
     ct = localtime(&ts);  
     /* scan the year, month and year from the input string */  
     printf("Current Date: %d/%d/%d\n",  
         ct->tm_mday, ct->tm_mon + 1, ct->tm_year + 1900);  
   printf("Current time : %d:%d:%d\n",  
         ct->tm_hour, ct->tm_min, ct->tm_sec);  
     }  
 }  
 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("---------------------------\n");  
   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("%[^\n]",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("\aFail to save!!\a");  
     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(){  
   SetConsoleTitle("Calender Project - Programming-technique.blogspot.com");  
   int choice;  
   char ch = 'a';  
   while(1){  
     ClearConsoleToColors(1, 13);  
     system("cls");  
     printf("1. Chek Current Date/Time \n");  
     printf("2. Find Your Age\n");  
     printf("3. Find the day at given date\n");  
     printf("4. Print full month calender\n");  
     printf("5. Add Note to any date\n");  
     printf("6. EXIT\n");  
     printf("ENTER YOUR CHOICE : ");  
     scanf("%d",&choice);  
     system("cls");  
     switch(choice){  
       case 1:  
         datetime();  
         break;  
       case 2:  
         agefinder();  
         break;  
       case 3:  
         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("\nPress any key to continue......");  
         getch();  
         break;  
       case 4 :  
         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 5:  
         AddNote();  
         break;  
       case 6 :  
         exit(0);  
     }  
   }  
   return 0;  
 }

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