SkullCrusher

Por favor preciso de ajuda para compreender uma parte do código abaixo: É um código para desenvolver calendários e na função abaixo: int dayNumber(int day, int month, int year) { static int t[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 }; year -= month < 3; return ( year + year/4 - year/100 + year/400 + t[month-1] + day) % 7; } A minha dúvida é sobre os numeros desta linha: static int t[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 }; Eu sei que os numeros se referem ao dia da semana mas o que eu não entendo é porque os números estão nessa ordem? Abaixo está o códico completo: // A C++ Program to Implement a Calendar // of an year #include<bits/stdc++.h> using namespace std; /*A Function that returns the index of the day of the date- day/month/year For e.g- Index Day 0 Sunday 1 Monday 2 Tuesday 3 Wednesday 4 Thursday 5 Friday 6 Saturday*/ int dayNumber(int day, int month, int year) { static int t[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 }; year -= month < 3; return ( year + year/4 - year/100 + year/400 + t[month-1] + day) % 7; } /* A Function that returns the name of the month with a given month number Month Number Name 0 January 1 February 2 March 3 April 4 May 5 June 6 July 7 August 8 September 9 October 10 November 11 December */ string getMonthName(int monthNumber) { string months[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; return (months[monthNumber]); } /* A Function to return the number of days in a month Month Number Name Number of Days 0 January 31 1 February 28 (non-leap) / 29 (leap) 2 March 31 3 April 30 4 May 31 5 June 30 6 July 31 7 August 31 8 September 30 9 October 31 10 November 30 11 December 31 */ int numberOfDays (int monthNumber, int year) { // January if (monthNumber == 0) return (31); // February if (monthNumber == 1) { // If the year is leap then February has // 29 days if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) return (29); else return (28); } // March if (monthNumber == 2) return (31); // April if (monthNumber == 3) return (30); // May if (monthNumber == 4) return (31); // June if (monthNumber == 5) return (30); // July if (monthNumber == 6) return (31); // August if (monthNumber == 7) return (31); // September if (monthNumber == 8) return (30); // October if (monthNumber == 9) return (31); // November if (monthNumber == 10) return (30); // December if (monthNumber == 11) return (31); } // Function to print the calendar of the given year void printCalendar(int year) { printf (" Calendar - %d\n\n", year); int days; // Index of the day from 0 to 6 int current = dayNumber (1, 1, year); // i --> Iterate through all the months // j --> Iterate through all the days of the // month - i for (int i = 0; i < 12; i++) { days = numberOfDays (i, year); // Print the current month name printf("\n ------------%s-------------\n", getMonthName (i).c_str()); // Print the columns printf(" Sun Mon Tue Wed Thu Fri Sat\n"); // Print appropriate spaces int k; for (k = 0; k < current; k++) printf(" "); for (int j = 1; j <= days; j++) { printf("%5d", j); if (++k > 6) { k = 0; printf("\n"); } } if (k) printf("\n"); current = k; } return; } // Driver Program to check above funtions int main() { int year = 2016; printCalendar(year); return (0); }