编译器进行语法分析

首先编译器进行语法分析，也就是要把那些字符串分离出来。

然后进行语义分析，就是把各个由语法分析分析出的语法单元的意义搞清楚。

最后生成的是目标文件，也称为obj文件。

再经过链接器的链接就可以生成最后的EXE文件了。

有些时候需要把多个文件产生的目标文件进行链接，产生最后的代码。这一过程称为交叉链接。

 

package Com.Table;
import java.util.Scanner;
public class EightTable {
    static String CaculateWeekDay(int y,int m,int d)
    {
        if(m==1)
        {
            m = 13;
            y--;
        }
        if(m==2)
        {
            m=14;
            y--;
        }
        int week=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7;
        String weeks = null;
        switch(week)
        {
            case 0: weeks="Monday"; break;
            case 1: weeks="Tuesday"; break;
            case 2: weeks="Wednesday"; break;
            case 3: weeks="Thursday"; break;
            case 4: weeks="Friday"; break;
            case 5: weeks="Saturday "; break;
            case 6: weeks="Sunday"; break;
        }
        return weeks;
    }
 
    public static void main(String [] args)
    {
        int [][] day = new int[5][7];
        System.out.print("input year：");
        Scanner scanner = new Scanner(System.in);
        int Year = scanner.nextInt();
        System.out.print("input mounths：");
        int Mounth = scanner.nextInt();
 
        System.out.println("Sunday \t Monday \t Tuesday \t Wednesday \t Thursday \t Friday \t Saturday");
        int flag = 0;
        String Week = CaculateWeekDay(Year, Mounth, 1);
        if (Week.equals("Monday"))
        {
            day[0][1] = 1;
        }
        if (Week.equals("Tuesday"))
        {
            day[0][2] = 1;
        }
        if (Week.equals("Wednesday"))
        {
            day[0][3] = 1;
        }
        if (Week.equals("Thursday"))
        {
            day[0][4] = 1;
        }
        if (Week.equals("Friday"))
        {
            day[0][5] = 1;
        }
        if (Week.equals("Saturday"))
        {
            day[0][6] = 1;
            flag = 1;
        }
        if (Week.equals("Sunday"))
        {
            day[0][0] = 1;
        }
 
        if (Mounth == 1 ||
                Mounth == 3 ||
                Mounth == 5 ||
                Mounth == 7 ||
                Mounth == 8 ||
                Mounth == 10 ||
                Mounth == 12)
        {
            for (int i = 0; i < 5; i++)
            {
                for (int j = 0; j < 7; j++)
                {
                    if (day[i][j] == 1)
                    {
                        for (int m = 0; m < 31; m++)
                        {
                            System.out.print(day[i][j] + m + "\t\t");
                            if ((j + m + 1) % 7 == 0)
                            {
                                System.out.println();
                            }
                        }
                    }
                    else
                    {
                        System.out.print("\t\t");
                    }
                }
 
            }
        }
        else if (Mounth == 4 ||
                Mounth == 6 ||
                Mounth == 9 ||
                Mounth == 11)
        {
            for (int i = 0; i < 5; i++)
            {
                for (int j = 0; j < 7; j++)
                {
                    if (day[i][j] == 1)
                    {
                        for (int m = 0; m < 30; m++)
                        {
                            System.out.print(day[i][j] + m + "\t\t");
                            if ((j + m + 1) % 7 == 0)
                            {
                                System.out.println();
                            }
                        }
                    }
                    else
                    {
                        System.out.print("\t\t");
                    }
                }
 
            }
        }
        else
        {
            if ((Year % 4 == 0 || Year % 400 == 0) && Year % 100 != 0)
            {
                for (int i = 0; i < 5; i++)
                {
                    for (int j = 0; j < 7; j++)
                    {
                        if (day[i][j] == 1)
                        {
                            for (int m = 0; m < 29; m++)
                            {
                                System.out.print(day[i][j] + m + "\t\t");
                                if ((j + m + 1) % 7 == 0)
                                {
                                    System.out.println();
                                }
                            }
                        }
                        else
                        {
                            System.out.print("\t\t");
                        }
                    }
                }
            }
            else
            {
                for (int i = 0; i < 5; i++)
                {
                    for (int j = 0; j < 7; j++)
                    {
                        if (day[i][j] == 1)
                        {
                            for (int m = 0; m < 28; m++)
                            {
                                System.out.print(day[i][j] + m + "\t\t");
                                if ((j + m + 1) % 7 == 0)
                                {
                                    System.out.println();
                                }
                            }
                        }
                        else
                        {
                            System.out.print("\t\t");
                        }
                    }
 
                }
            }
        }
    }
}