Question

I know I'm on the right path, but don't know where to continue from here. This is a C++ assignment

Your job is to write that will display a calendar for any given month of a given year. The user will need to type the number of the month as an integer from 1 to 12 (1 is for January, etc.), and the year as a 4-digit integer. This assignment simply requires that your program make use of more than one loop statements and as many functions as possible to breakdown the problem into simpler sub-problems. Also, you must have at least one valued function and one void function. In addition, your program should keep the calendar neatly tabulated.

#include <iostream>
#include <string>
#include <stdio.h>
#include <math.h>
#include <iomanip>
#include <sstream>
using namespace std;

void grabTheDValues(int &m, int &y, int &century, int month, int year);
int DGrabbed(int m, int y, int century, int d);
bool leapYearIf(int y);
int leapYear(int y);
int daysInMonth(int m, int y);
void printCa1endarHead(int m);
void skipws(int i);
string monthName(int month);
void skipDay(int dy);
void displayMonth(int numOfDays, int dOfWeek);

int main() {

   int month = 0;
   int year = 0;
   int m = 0, y = 0, century = 0, d = 0;
   int itsTheFirstOfTheMonth;
   int numOfDays;

   itsTheFirstOfTheMonth = DGrabbed(m, y, century, d);

   cout << "Enter a month as an integer (3 for March ... 12 for December, 13 for January, 14 for February, etc.): ";
   cin >> month;
   cout << "Enter a year as a four digit integer: ";
   cin >> year;

   grabTheDValues(m, y, century, month, year);
   if (month >= 3 && month <= 14) {
       numOfDays = dayInMonth(m);
       printCa1endarHead(m);
       displayMonth(numOfDays, itsTheFirstOfTheMonth);
       cout << endl << endl;
   }
   cout << setw(15) << DGrabbed << endl;

   system("pause");
   return 0;
}

void grabTheDValues(int &m, int &y, int &century, int month, int year) {
   m = month;
   century = (year - y) / 100;
   y = year - 100 * century;
}

int DGrabbed(int m, int y, int century, int d) {
   d = ((26 * (m + 1) / 10) + y + (y / 4) + (century / 4) + (5 * century)) % 7;
   return d;
}

bool leapYearIf(int y) {
   return(y % 400 == 0) || (y % 4 == 0) && (y % 100 == 0);
}

int leapYear(int y) {
   return (y/4) - (y/100) + (y/400);
}

string monthName(int month) {
   string nameOfMonth[] = { "January", "February", "March", "April", "May", "June",
       "July", "August", "September", "Octoher", "November", "December" };
   return (nameOfMonth[month]);
}

int daysInMonth(int m, int y) {
   if (m == 14) {
       if (y % 400 == 0 || y % 4 == 0 && y % 100 != 0)
           return(29);
       else
           return(28);
   }
   else if (m == 3 || m = 5 || m == 7 || m == 8 || m == 10 || m == 12){
       return (31);
   }
   else{
       return(30);
   }
}

void printCa1endarHead(int m) {
   if (m == 13) {
       skipws(7);
       cout << "January" << endl;
   }
   else if (m == 14) {
       skipws(7);
           cout << "February" << endl;
   }
   else if (m == 3) {
       skipws(7);
       cout << "March" << endl;
   }
   else if (m == 4) {
       skipws(7);
       cout << "April" << endl;
   }
   else if (m == 5) {
       skipws(7);
       cout << "May" << endl;
   }
   else if (m == 6) {
       skipws(7);
       cout << "June" << endl;
   }
   else if (m == 7) {
       skipws(7);
       cout << "July" << endl;
   }
   else if (m == 8) {
       skipws(7);
       cout << "August" << endl;
   }
   else if (m == 9) {
       skipws(7);
       cout << "September" << endl;
   }
   else if (m == 10) {
       skipws(7);
       cout << "October" << endl;
   }
   else if (m == 11) {
       skipws(7);
       cout << "November" << endl;
   }
   else if (m == 12) {
       skipws(7);
       cout << "December" << endl;
   }
   cout << "Sun\tMon\tTu\tWed\tTh\tFri\tSat" << endl;
   cout << "-------------------------------";
}

void skipws(int i) {
   while (i > 0) {
       cout " ";
       i = i - 1;
   }
}
void displayMonth(int numOfDays, int dOfWeek) {
   int day = 1;
   skipDay(dOfWeek);
   while (day <= numOfDays) {
       cout << setw(2) << day << " ";
       if (dOfWeek == 6) {
           cout << endl;
           dOfWeek = 0;
       }
       else {
           dOfWeek = dOfWeek + 1;
           day = day + 1;
       }
   }
}
void skipDay(int dy) {
   return skipDay(3 * dy);
}

Answer 1

#include <iostream>
#include <string>
#include <stdio.h>
#include <math.h>
#include <iomanip>
#include <sstream>
using namespace std;

void grabTheDValues(int &m, int &y, int &century, int month, int year);
int DGrabbed(int m, int y, int century, int d);
bool leapYearIf(int y);
int leapYear(int y);
int daysInMonth(int m, int y);
void printCa1endarHead(int m);
void skipws(int i);
string monthName(int month);
void skipDay(int dy);
void displayMonth(int numOfDays, int dOfWeek);

int main() {

int month = 0;
int year = 0;
int m = 0, y = 0, century = 0, d = 0;
int itsTheFirstOfTheMonth;
int numOfDays;

cout << "Enter a month as an integer (3 for March ... 12 for December, 13 for January, 14 for February, etc.): ";
cin >> month;
cout << "Enter a year as a four digit integer: ";
cin >> year;

m = month;
y = year;
itsTheFirstOfTheMonth = DGrabbed(m, y, 1, d);

grabTheDValues(m, y, century, month, year);
if (month >= 3 && month <= 14) {
numOfDays = daysInMonth(m,y);
printCa1endarHead(m);
displayMonth(numOfDays, itsTheFirstOfTheMonth);
cout << endl << endl;
}
// cout << setw(15) << DGrabbed << endl;

system("pause");
return 0;
}

void grabTheDValues(int &m, int &y, int &century, int month, int year) {
m = month;
century = (year - y) / 100;
y = year - 100 * century;
}

int DGrabbed(int m, int y, int century, int d) {
d = ((26 * (m + 1) / 10) + y + (y / 4) + (century / 4) + (5 * century)) % 7;
return (d+1)%7;
}

bool leapYearIf(int y) {
return(y % 400 == 0) || (y % 4 == 0) && (y % 100 == 0);
}

int leapYear(int y) {
return (y/4) - (y/100) + (y/400);
}

string monthName(int month) {
string nameOfMonth[] = { "January", "February", "March", "April", "May", "June",
"July", "August", "September", "Octoher", "November", "December" };
return (nameOfMonth[month]);
}

int daysInMonth(int m, int y) {
if (m == 14) {
if (y % 400 == 0 || y % 4 == 0 && y % 100 != 0)
return(29);
else
return(28);
}
else if ((m == 3) || (m = 5) || (m == 7) || (m == 8) || (m == 10) || (m == 12)){
return (31);
}
else{
return(30);
}
}

void printCa1endarHead(int m) {
if (m == 13) {
skipws(7);
cout << "January" << endl;
}
else if (m == 14) {
skipws(7);
cout << "February" << endl;
}
else if (m == 3) {
skipws(7);
cout << "March" << endl;
}
else if (m == 4) {
skipws(7);
cout << "April" << endl;
}
else if (m == 5) {
skipws(7);
cout << "May" << endl;
}
else if (m == 6) {
skipws(7);
cout << "June" << endl;
}
else if (m == 7) {
skipws(7);
cout << "July" << endl;
}
else if (m == 8) {
skipws(7);
cout << "August" << endl;
}
else if (m == 9) {
skipws(7);
cout << "September" << endl;
}
else if (m == 10) {
skipws(7);
cout << "October" << endl;
}
else if (m == 11) {
skipws(7);
cout << "November" << endl;
}
else if (m == 12) {
skipws(7);
cout << "December" << endl;
}
cout << "Sun\tMon\tTu\tWed\tTh\tFri\tSat" << endl;
cout << "--------------------------------------------------"<<endl;
}

void skipws(int i) {
while (i > 0) {
cout << " ";
i = i - 1;
}
}
void displayMonth(int numOfDays, int dOfWeek) {
int day = 1;
skipDay(dOfWeek);
while (day <= numOfDays) {
cout << day<< "\t";
if (dOfWeek == 6) {
cout << endl;
dOfWeek = 0;
}
else {
dOfWeek = dOfWeek + 1;
}
   day = day + 1;
}
}
void skipDay(int dy) {
   if(dy == 7){
       dy=0;
   }
for(int i =0 ;i<dy;i++){
   cout<<"\t"<<" ";
}
}

SCREEN SHOT:

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