#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
    int month, days, day, count=1;
    cout<<"\t\t\t\tCalendar\n";
    cout<<"Enter number of month: ";
    cin>>month;
    cout<<"Enter day of the month (1 for Sanday, 2 for Monday...): ";
    cin>>day;
    if (month ==1){cout<<"\n\t\t\tJanuary\n\n"; days=31;}
    if (month ==2){cout<<"\n\t\t\tFebruary\n\n"; days=28;}
    if (month ==3){cout<<"\n\t\t\tMarch\n\n"; days=31;}
    if (month ==4){cout<<"\n\t\t\tApril\n\n"; days=30;}
    if (month ==5){cout<<"\n\t\t\tMay\n\n"; days=31;}
    if (month ==6){cout<<"\n\t\t\tJun\n\n"; days=30;}
    if (month ==7){cout<<"\n\t\t\tJuly\n\n"; days=31;}
    if (month ==8){cout<<"\n\t\t\tAogust\n\n"; days=31;}
    if (month ==9){cout<<"\n\t\t\tSeptember\n\n"; days=30;}
    if (month ==10){cout<<"\n\t\t\tOctober\n\n"; days=31;}
    if (month ==11){cout<<"\n\t\t\tNovember\n\n"; days=30;}
    if (month ==12){cout<<"\n\t\t\tDecember\n\n"; days=31;}
    
    cout<<"\nSan\tMon\tTue\tWen\tThu\tFri\tSat\n";
    while (count<=days){
        switch(day){
        case 1:
            cout<<count<<"\t";break;
        case 2:
            cout<<"\t"<<count<<" "; break;
        case 3:
            cout<<"\t\t"<<count<<" "; break;}// by the way case 3 does not display correctly at all...

        count++;}
    return 0;
}

#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
    int month, days, day, count=1;
    cout<<"\t\t\t\tCalendar\n";
    cout<<"Enter number of month: ";
    cin>>month;
    while (month>12 || month<1){
    cout<<"\nYou have entered invalid number of month!";
    cout<<"Please reenter number of month"; cin>>month;}
    
    cout<<"Enter first day of the month (1 for Sunday, 2 for Monday...): ";
    cin>>day;
    while(day>7 || day<1){
    cout<<"You have entered invalid day of the month! ";
    cout<<"Please reenter first day of the month: ";
    cin>>day;}
    if (month ==1){cout<<"\n\t\t\tJanuary\n\n"; days=31;}
    if (month ==2){cout<<"\n\t\t\tFebruary\n\n"; days=28;}
    if (month ==3){cout<<"\n\t\t\tMarch\n\n"; days=31;}
    if (month ==4){cout<<"\n\t\t\tApril\n\n"; days=30;}
    if (month ==5){cout<<"\n\t\t\tMay\n\n"; days=31;}
    if (month ==6){cout<<"\n\t\t\tJun\n\n"; days=30;}
    if (month ==7){cout<<"\n\t\t\tJuly\n\n"; days=31;}
    if (month ==8){cout<<"\n\t\t\tAogust\n\n"; days=31;}
    if (month ==9){cout<<"\n\t\t\tSeptember\n\n"; days=30;}
    if (month ==10){cout<<"\n\t\t\tOctober\n\n"; days=31;}
    if (month ==11){cout<<"\n\t\t\tNovember\n\n"; days=30;}
    if (month ==12){cout<<"\n\t\t\tDecember\n\n"; days=31;}
    cout<<"\nSun\tMon\tTue\tWen\tThu\tFri\tSat";
    for (;day<=7;day++){
        if (day==1){ cout<<" ";}
        if (day==2){ cout<<"\t";}
        if (day==3){ cout<<"\t\t";}
        if (day==4){ cout<<"\t\t\t";}
        if (day==5){ cout<<"\t\t\t\t";}
        if (day==6){ cout<<"\t\t\t\t\t";}
        if (day==7){ cout<<"\t\t\t\t\t\t";}}
    for (;count<=days; count++)
    {cout<<count<<"\t";}
    
    return 0;
    }