Restaurant billing software

Code :
Code :
/* This code is used to determine certain information by giving the
necessary data */

/*Author: Earl Christian Salvador*/

#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <DOS.h>
int menu();
int year, month, day;
void main()
{
start:
clrscr();
printf("Enter Year (1970-2005):");
scanf("%d",&year);
if (year<1970||year>2005)
    goto start;

skip:
printf("
Enter Your Month No. (1-12):");
scanf("%d",&month);

if (month==1)
    {
    back:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=19)
        {
        clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of JANUARY.
");
        printf("Your BirthStone is GARNET.
");
        printf("You are a CAPRICORN.");
        }
    else if (day>19&&day<=31)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of JANUARY.
");
        printf("Your BirthStone is GARNET.
");
        printf("You are an AQUARIUS.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back;}
    }

else if (month==2)
    {
    back1:
    printf("
Enter Day (1-29):");
    scanf("%d",&day);
    if (day<=18)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of FEBRUARY.
");
        printf("Your BirthStone is AMETHYST.
");
        printf("You are an AQUARIUS.");
        }
    else if (day>18&&day<=29)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of FEBRUARY.
");
        printf("Your BirthStone is AMETHYST.
");
        printf("You are a PISCES.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back1;}
    }

else if (month==3)
    {
    back2:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=20)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of MARCH.
");
        printf("Your BirthStone is AQUAMARINE or BLOODSTONE.
");
        printf("You are a PISCES.");
        }
    else if (day>20&&day<=31)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of MARCH.
");
        printf("Your BirthStone is AQUAMARINE or BLOODSTONE.
");
        printf("You are an ARIES.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back2;}
    }

else if (month==4)
    {
    back3:
    printf("
Enter Day (1-30):");
    scanf("%d",&day);
    if (day<=19)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of APRIL.
");
        printf("Your BirthStone is DIAMOND.
");
        printf("You are an ARIES.");
        }
    else if (day>19&&day<=30)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of APRIL.
");
        printf("Your BirthStone is DIAMOND.
");
        printf("You are a TAURUS.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back3;}
    }

else if (month==5)
    {
    back4:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=20)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of MAY.
");
        printf("Your BirthStone is EMERALD.
");
        printf("You are a TAURUS.");
        }
    else if (day>20&&day<=31)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of MAY.
");
        printf("Your BirthStone is EMERALD.
");
        printf("You are a GEMINI.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back4;}
    }

else if (month==6)
    {
    back5:
    printf("
Enter Day (1-30):");
    scanf("%d",&day);
    if (day<=20)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of JUNE.
");
        printf("Your BirthStone is PEARL, ALEXANDRITE or MOONSTONE.
");
        printf("You are a GEMINI.");
        }
    else if (day>20&&day<=30)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of JUNE.
");
        printf("Your BirthStone is PEARL, ALEXANDRITE or MOONSTONE.
");
        printf("You are a CANCER.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back5;}
    }

else if (month==7)
    {
    back6:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=22)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of JULY.
");
        printf("Your BirthStone is RUBY.
");
        printf("You are a CANCER.");
        }
    else if (day>22&&day<=30)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of JULY.
");
        printf("Your BirthStone is RUBY.
");
        printf("You are a LEO.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back6;}
    }

else if (month==8)
    {
    back7:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=22)
        {
                     clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of AUGUST.
");
        printf("Your BirthStone is PERIDOT or SARDONYX.
");
        printf("You are a LEO.");
        }
    else if (day>22&&day<=31)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of AUGUST.
");
        printf("Your BirthStone is PERIDOT or SARDONYX.
");
        printf("You are a VIRGO.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back7;}
    }

else if (month==9)
    {
    back8:
    printf("
Enter Day (1-30):");
    scanf("%d",&day);
    if (day<=22)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of SEPTEMBER.
");
        printf("Your BirthStone is SAPPHIRE.
");
        printf("You are a VIRGO.");
        }
    else if (day>22&&day<=30)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of SEPTEMBER.
");
        printf("Your BirthStone is SAPPHIRE.
");
        printf("You are a LIBRA.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back8;}
    }

else if (month==10)
    {
    back9:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=22)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of OCTOBER.
");
        printf("Your BirthStone is OPAL or TOURMALINE.
");
        printf("You are a LIBRA.");
        }
    else if (day>22&&day<=31)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of OCTOBER.
");
        printf("Your BirthStone is OPAL or TOURMALINE.
");
        printf("You are a SCORPIO.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back9;}
    }

else if (month==11)
    {
    back10:
    printf("
Enter Day (1-30):");
    scanf("%d",&day);
    if (day<=21)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of NOVEMBER.
");
        printf("Your BirthStone is TOPAZ.
");
        printf("You are a SCORPIO.");
        }
    else if (day>21&&day<=30)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of NOVEMBER.
");
        printf("Your BirthStone is TOPAZ.
");
        printf("You are a SAGITARIUS.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back10;}
    }

else if (month==12)
    {
    back11:
    printf("
Enter Day (1-31):");
    scanf("%d",&day);
    if (day<=21)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of DECEMBER.
");
        printf("Your BirthStone is TURQUOISE OR ZIRCON.
");
        printf("You are a SAGITARIUS.");
        }
    else if (day>21&&day<=31)
        {
                clrscr();
        printf("%d-%d-%d
",month,day,year);
        menu();
        printf("You are born on the month of DECEMBER.
");
        printf("Your BirthStone is TURQUOISE OR ZIRCON.
");
        printf("
You are a CAPRICORN.");
        }
    else
        {printf("Enter Correct Day!!!!!!");
        goto back11;}
    }
else
    {printf("Enter Correct No.!!!!!!");
    delay (99999999);
    delay (99999999);
    delay (99999999);
    delay (99999999);
    goto skip;}
getch();
}

int menu()
{
if (year==1992||year==1980||year==2004)
    printf("You are born on the Year of the MONKEY.
");
else if (year==1993||year==1981||year==2005)
    printf("You are born on the Year of the ROOSTER.
");
else if (year==1994||year==1982||year==1970)
    printf("You are born on the Year of the DOG.
");
else if (year==1995||year==1971||year==1983)
    printf("You are born on the Year of the BOAR.
");
else if (year==1996||year==1984||year==1972)
    printf("You are born on the Year of the RAT.
");
else if (year==1997||year==1985||year==1973)
    printf("You are born on the Year of the OX.
");
else if (year==1998||year==1986||year==1974)
    printf("You are born on the Year of the TIGER.
");
else if (year==1975||year==1999||year==1987)
    printf("You are born on the Year of the RABBIT.
");
else if (year==1976||year==2000||year==1988)
    printf("You are born on the Year of the DRAGON.
");
else if (year==1977||year==2001||year==1989)
    printf("You are born on the Year of the SNAKE.
");
else if (year==2002||year==1978||year==1990)
    printf("You are born on the Year of the HORSE.
");
else if (year==2003||year==1979||year==1991)
    printf("You are born on the Year of the RAM.
");
return;
}