Making a Calendar in C++

[mateopedersen]

This is what I have so far. Can someone help me with my if statements, to get February to print with 29 days during a leap year? And also to get the first week of each month aligned correctly?

Here's a screenshot.
http://i.imgur.com/F6zWF.jpg

Like this: https://www.betacalendars.com/uploads/2019/01/February-2020-Calendar.jpg

[salem c]

Yeah, like, where's your C++ code?

URL's to a couple of pretty pictures doesn't tell us you've done any work.

[Handy Andy]

Hello mateopedersen,

The answer is 42. https://www.youtube.com/watch?v=aboZctrHfK8

http://www.cplusplus.com/articles/Ny86b7Xj/

As salem c says with out your code no one has any idea what you have done or what needs fixed.

Andy

[talos]

Please share some code, OP.

[dutch]

You shouldn't need to enter the weekday of January 1.
You can find it out pretty easily like this.
(Maybe someone will also post a more modern way of doing this.)

// find day of week that year y starts on

#include <iostream>
#include <ctime>

int start_weekday_of_year(int y) {
    // set up the tm structure (https://en.cppreference.com/w/c/chrono/tm)
    std::tm t {}; // zero all fields; note that a tm_mon of 0 means January
    t.tm_mday = 1;
    t.tm_year = y - 1900;

    // call mktime on it to normalize the fields, 
    // which includes filling in the weekday value.
    std::mktime(&t);

    return t.tm_wday; // 0 (Sun) to 6 (Sat)
}

int main() {
    const char* const day_names[] {"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
    for (;;) {
        int y;
        std::cin >> y;
        int d = start_weekday_of_year(y);
        std::cout << "Year " << y << " starts on " << day_names[d] << '\n';
    }
}