CHARITY MANAGEMENT SYSTEM					
							Institution
							Student name
							Location
							Tutor
							Date
#include <windows.h>
#include<stdio.h>            //contains printf,scanf etc
#include<conio.h>            //contains delay(),getch(),gotoxy(),etc
#include <stdlib.h>
#include<string.h>          //contains strcmp(),strcpy(),Strlen(),etc
#include<ctype.h>           //contains toupper(),tolower(),etc
#include<dos.h>             //contains dos getdate
#include<time.h>

#define RETURNTIME 1 	// contains return date, etc
//list of function prototype
char catagories[][16]={"Buying bag","selling bag",}; 	//global variables
void returnfunc(void);		//it simply sets the value of hidden variable, a function accepts zero or more parameter and return one variable
void welcome(void);			//declaration for welcome function
void login(void);			//declaration for login function
void mainmenu(void);		//declaration for the menu function
void addbags(void);		//declaration for the add function
void sellbags(void);		//declaration for the delete function
void exitapplication(void);		//declaration for exiting function
int  getdata();
int  checkid(int);
int t(void);

COORD coord = {0, 0}; 		//function to set coordinates to 0,0
COORD max_res,cursor_size;
void gotoxy (int x, int y)		//function that sets the cursor positiion for simply to move the cursor on your monitor screen wherever desired.
{
        coord.X = x; coord.Y = y;		//function to input X and Y coordinates
        SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
}
void delay(unsigned int mseconds)
{
    clock_t goal = mseconds + clock();		//shows the processor clock time used since the beginning of an
											//implementation defined era (normally the beginning of the program).
    while (goal > clock());
}
FILE *fp,*ft,*fs;	//global files that can be accessed from anywhere in program

//list of global variable
int s;
char findbag;

struct meroDate
{
    int mm,dd,yy;
};
struct bags
{
    int id;
    char stname[20];
    char name[20];
    char Writer[20];
    int quantity;
    float Amount;
    int bagno;
    char *cat;
    struct meroDate issued;
    struct meroDate duedate;
};
struct bags r;
int main()

{
	welcome();
      login();
      getch();
   return 0;

}

void welcome()	//function to display welcome screen
{
	gotoxy(4,6);
	printf("By student\n");		//printf is used to display the output by print the character, string, integer etc.
	gotoxy(1,10);
	printf("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<");
	gotoxy(32,12);
	printf("WELCOME TO CHARITY MANAGEMENT SYSTEM");
	gotoxy(32,14);
	printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
	//sleep(3);
	system("cls");
	getch();		//it is used as a trick to hold the output screen live for a desired period of time by the user
	login();
	mainmenu();
}
char u[30],p[30];
void login()		//function that display login screen
{
	do{
	printf("\n\n\n\t\t\t ENTER THE USERNAME AND PASSWORD\n\n\n\n");
	printf("\n\t\t\tUSERNAME: ");
	scanf("%s",&u);						//scanf is used to read input such as character, string, numeric data from keyboard.
	printf("\n\t\t\tPASSWORD: ");
	scanf("%s",&p);
	if((strcmp(u,"nil")==0) && (strcmp(p,"nil")==0))
	{
		printf("\n\n\t\t login successful");
		printf("\n\n\n\t\t\t\t Press any key for main menu.....");
		getch();
		mainmenu();
	}
	else
	{
		printf("\n\n\t\tInvalid username and password");
	}

	}while("number_of_try");

}

// function to display main menu
void mainmenu()
{

    system("cls");
	int i; //local variable for switch options
	gotoxy(20,3);
	printf(" MAIN MENU ");
	gotoxy(20,5);
	printf(" 1. Buy bag   ");
	gotoxy(20,7);
	printf(" 2. sell bag");
	gotoxy(20,9);
	printf(" 3. Exit Application");
	gotoxy(20,11);
	t();
	gotoxy(20,13);
	printf("Enter your choice:");
	switch(getch())
	{
		case '1':
		addbags();
		break;
	case '2':
		sellbags();
		break;
	    case '3':
	    {
		system("cls");
		delay(3000);
		exit(0);
	    }
	    default:
		{
		gotoxy(10,23);
		printf("\nWrong Entry!!");
		if(getch())
		mainmenu();
		}

    }
}
void addbags(void)    //function to add bags
{
	system("cls");
	int i;		//local variable for switch option
	gotoxy(20,5);
	printf("\tSTATE OF BAGS");
	gotoxy(20,7);
	printf(" 1. Excellent condition ");
	gotoxy(20,9);
	printf(" 2. Very good condition");
	gotoxy(20,11);
	printf(" 3. Good condition");
	gotoxy(20,13);
	printf(" 4. Fair condition");
	gotoxy(20,15);
	printf(" 5. Poor condition");
	gotoxy(20,17);
	printf(" 6. Reject condition");
	gotoxy(20,19);
	printf(" 7. Main menu");
	gotoxy(20,21);
	printf("Enter your choice:");
	scanf("%d",&s);
	if(s==7)

	mainmenu() ;
	system("cls");
	fp=fopen("Project.dat","ab+");
	if(getdata()==1)
	{
	r.cat=catagories[s-1];
	fseek(fp,0,SEEK_END);			//fseek sets the file position of the given offset
	fwrite(&r,sizeof(r),1,fp);		//size_r this is the unsigned integral type and is the result of the sizeof keyword.
	fclose(fp);
	gotoxy(21,14);
	printf("The record is sucessfully saved");
	gotoxy(21,15);
	printf("Save any more?(Y / N):");
	if(getch()=='n')
	    mainmenu();
	else
	    system("cls");
	    addbags();
	}
}
void sellbags()    //function that delete from file fp

{
    system("cls");
    int d;
    int h;
    char another='y';
    while(another=='y')  	//cause infinite loop
    {
	system("cls");
	gotoxy(10,5);
	printf("Enter the number of bags to sell :");
	scanf("%d",&d);
	printf("Enter the customer's carrying capacity :");
	scanf("%d",&h);
	if(&h>=r.quantity){
	fp=fopen("Project.dat","rb+");
	rewind(fp);
	while(fread(&r,sizeof(r),1,fp)==1)
	{
	    if(r.id==d)
	    {

		gotoxy(10,7);
		printf("The bag record is available");
		gotoxy(10,8);
		printf("Bag location is %s",r.name);
		gotoxy(10,9);
		//printf("Bags description weight is %d",r.bagno);
		//gotoxy(10,11);
		printf("Bag description weight is %d",r.quantity);
        gotoxy(10,13);
		printf("Customer's carrying capacity is %d",h);

		findbag='t';
	    }
	}}
	else{
      printf("The buyer needs more carrying capacity :");
	}
	if(findbag!='t')
	{
	    gotoxy(10,10);
	    printf("No record is found to sell");
	    if(getch())
	    mainmenu();
	}
	if(findbag=='t' )
	{
	    gotoxy(10,17);
	    printf("Compare customer's carrying capacity with the bag's description weight");
	    printf("Is it possible to sell it?(Y/N):");
	    if(getch()=='y')
	    {
		ft=fopen("temp.dat","wb+");   //for deleting temporary files
		rewind(fp);					//sets the file position to the beginning of the file of the given stream
		while(fread(&r,sizeof(r),1,fp)==1)
		{
		    if(r.id!=d)
		    {
			fseek(ft,0,SEEK_CUR);			//sets current position of file
			fwrite(&r,sizeof(r),1,ft); 	  //write all items in temporary file except we want to delete
		    }
		}
		fclose(ft);
		fclose(fp);
		remove("Project.dat");
		rename("temp.dat","Project.dat"); 		//read all items from temporary file except we want to delete
		fp=fopen("Project.dat","rb+");
		if(findbag=='t')
		{
		    gotoxy(10,13);
		    printf("The bag is successfully sold");
		    gotoxy(10,15);
		    printf("sell another bag?(Y/N)");
		}
	    }
	else
	mainmenu();
	fflush(stdin);		//the fflush function causes any unwritten data for that stream to be delivered to the host environment to be written to the file,
	                	//so the behaviour is undefined
	another=getch();
	}
	}
    gotoxy(10,15);
    mainmenu();
}
void issuebags(void)  	//function for issuing bags
{
    int t;		//local variable for switch option

    system("cls");
    gotoxy(10,3);
    printf("   ISSUE SECTION ");
    gotoxy(10,5);
    printf(" 1. Issue a Bag");
    gotoxy(10,7);
    printf(" 2. View Issued Bag");
    gotoxy(10,9);
    printf(" 3. Search Issued Bag");
    gotoxy(10,11);
    printf(" 4. Remove Issued Bag");
    gotoxy(10,14);
    printf("Enter a Choice:");
    switch(getch())
    {
	case '1':  //issue bag
	{
		system("cls");
		int c=0;
		char another='y';
		while(another=='y')		//infinite loop
		{
			system("cls");
			gotoxy(15,4);
			printf(" Issue Bag section ");
			gotoxy(10,6);
			printf("Enter the Bag Id:");
			scanf("%d",&t);
			fp=fopen("Project.dat","rb");
			fs=fopen("Issue.dat","ab+");
			if(checkid(t)==0) 		//check weather the bag is available in library or not
			{
			     gotoxy(10,8);
			     printf("The bag record is available");
			     gotoxy(10,9);
			     printf("There are %d unissued bags ",r.quantity);
			     gotoxy(10,10);
			     printf("The name of bag is %s",r.name);
			     gotoxy(10,11);
			     printf("Enter name:");
			     scanf("%s",r.stname);
			     gotoxy(10,12);
			     printf("Issued date=%d-%d-%d",r.issued.dd,r.issued.mm,r.issued.yy);	//for current date
			     gotoxy(10,13);
			     printf("The BAG of ID %d is issued",r.id);
			     r.duedate.dd=r.issued.dd+RETURNTIME;   		//for return date
			     r.duedate.mm=r.issued.mm;
			     r.duedate.yy=r.issued.yy;
			     if(r.duedate.dd>30)
			     {
				 r.duedate.mm+=r.duedate.dd/30;
				 r.duedate.dd-=30;

			     }
			     if(r.duedate.mm>12)
			     {
				r.duedate.yy+=r.duedate.mm/12;
				r.duedate.mm-=12;

			     }
			     gotoxy(10,14);
			     printf("To be return:%d-%d-%d",r.duedate.dd,r.duedate.mm,r.duedate.yy);
			     fseek(fs,sizeof(r),SEEK_END);		//end of the file
			     fwrite(&r,sizeof(r),1,fs);
			     fclose(fs);
			     c=1;
			}
			if(c==0)
			{
			gotoxy(10,11);
			printf("No record found");
			}
			gotoxy(10,15);
			printf("Issue any more(Y/N):");
			fflush(stdin);
			another=getche();
			fclose(fp);
		}

		break;
	}
	case '2':  	//case shows the issue bags list
	{
		system("cls");
		int j=4;
		gotoxy(2,1);
		printf("                          Issued bag list                               ");
		gotoxy(2,2);
		printf("NAME    CATEGORY    ID    BAG NAME    ISSUED DATE    RETURN DATE");
	       fs=fopen("Issue.dat","rb");
		while(fread(&r,sizeof(r),1,fs)==1)
		{

			gotoxy(2,j);
			printf("%s",r.stname);
			gotoxy(18,j);
			printf("%s",r.cat);
			gotoxy(30,j);
			printf("%d",r.id);
			gotoxy(36,j);
			printf("%s",r.name);
			gotoxy(51,j);
			printf("%d-%d-%d",r.issued.dd,r.issued.mm,r.issued.yy );
			gotoxy(65,j);
			printf("%d-%d-%d",r.duedate.dd,r.duedate.mm,r.duedate.yy);
			gotoxy(50,25);
			//printf("Current date=%d-%d-%d",d.day,d.month,d.year);
			j++;

		}
		fclose(fs);
		gotoxy(1,25);
		returnfunc();
	}
	break;
	case '3':   //search issued bags by id
	{
		system("cls");
		gotoxy(10,6);
		printf("Enter Bag ID:");
		int p,c=0;
		char another='y';
		while(another=='y')
		{

			scanf("%d",&p);
			fs=fopen("Issue.dat","rb");
			while(fread(&r,sizeof(r),1,fs)==1)
			{
				if(r.id==p)
				{
					issuerecord();
					gotoxy(10,12);
					printf("Press any key.......");
					getch();
					issuerecord();
					c=1;
				}

			}
			fflush(stdin);
			fclose(fs);
			if(c==0)
			{
				gotoxy(10,8);
				printf("No Record Found");
			}
			gotoxy(10,13);
			printf("Try Another Search?(Y/N)");
			another=getch();
		}
	}
	break;
	case '4':  	//case remove issued bags from list
	{
		system("cls");
		int b;
		FILE *fg;  	//delete for temporary file is declared
		char another='y';
		while(another=='y')
		{
			gotoxy(10,5);
			printf("Enter bag id to remove:");
			scanf("%d",&b);
			fs=fopen("Issue.dat","rb+");
			while(fread(&r,sizeof(r),1,fs)==1)
			{
				if(r.id==b)
				{
					issuerecord();
					findbag='t';
				}
				if(findbag=='t')
				{
					gotoxy(10,12);
					printf("Do You Want to Remove it?(Y/N)");
					if(getch()=='y')
					{
						fg=fopen("record.dat","wb+");
						rewind(fs);
						while(fread(&r,sizeof(r),1,fs)==1)
						{
							if(r.id!=b)
							{
							fseek(fs,0,SEEK_CUR);
							fwrite(&r,sizeof(r),1,fg);
							}
						}
						fclose(fs);
						fclose(fg);
						remove("Issue.dat");
						rename("record.dat","Issue.dat");
						gotoxy(10,14);
						printf("The issued bag is removed from list");

				       }

				}
				if(findbag!='t')
				{
					gotoxy(10,15);
					printf("No Record Found");
				}
			}
			gotoxy(10,16);
			printf("Delete any more?(Y/N)");
			another=getch();
		}
	}
	default:
	gotoxy(10,18);
	printf("\nWrong Entry!!");
    getch();
	issuebags();
	break;
      }
      gotoxy(1,30);
      returnfunc();
}

void returnfunc(void)
{
    {
	printf(" Press ENTER to return to main menu");
    }
    r:
    if(getch()==13) 	//allow only the use of enter
    mainmenu();
    else
    goto r;
}
int getdata()
{
	int t;
	gotoxy(20,3);
	printf("Enter the Information Below");
	gotoxy(21,5);
	printf("Category:");
	gotoxy(31,5);
	printf("%s",catagories[s-1]);
	gotoxy(21,6);
	printf("No of bags:\t");
	gotoxy(30,6);
	scanf("%d",&t);
	r.id=t;
	gotoxy(21,7);
	printf("Location:");
	scanf("%s",r.name);
	gotoxy(21,9);
	printf("Description weight:");
	scanf("%d",&r.quantity);
	gotoxy(21,10);
	printf("Description cost:");
	scanf("%f",&r.Amount);
	return 1;
}
int checkid(int t)  	//checks weather the bag exist in library or not
{
	rewind(fp);
	while(fread(&r,sizeof(r),1,fp)==1)		//size_r this is the unsigned integral type and is the result of the sizeof keyword.
	if(r.id==t)
	return 0;  		//return 0 if bag exist
      return 1; 	//return 1 if bag not exist
}
int t(void) 	//for adding time
{
time_t t;
time(&t);
printf("Date and time:%s\n",ctime(&t));

return 0 ;
}

void issuerecord()  	//function that displayed the bag's information
{
		 system("cls");
		 gotoxy(10,8);
		 printf("Issued Date:%d-%d-%d",r.issued.dd,r.issued.mm,r.issued.yy);
		 gotoxy(10,10);
		 printf("Returning Date:%d-%d-%d",r.duedate.dd,r.duedate.mm,r.duedate.yy);
}
// End of program




REFERENCES
By Hueman theme, semicolon codes, 2018. 
Michael Vine C Programming for the Absolute Beginner, 2nd Edition