Mini project Department Store System using C

• Calculate Bill
• Add Goods
• Edit Goods
• Display All
• Search using Code, Rate and Quantity
• Delete Goods
• Exit from program

Source Code

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
#include<windows.h>

#define ANS 15
#define ACS 4
 COORD coord={0,0}; // this is global variable
                                    //center of axis is set to the top left cornor of the screen
void gotoxy(int x,int y)
{
    coord.X=x;
    coord.Y=y;
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coord);
}
/*declaration of checking functions*/
void c_code(char[]);
int check(char[]);

/*structure declaration*/
typedef struct{
char name[ANS],code[ACS];
float rate;
int quantity;
}rec;
rec item;

/*declaration of display functions*/
void curser(int);
void dbill();
void d_mainmenu();
void display(rec *,int,int);
void window(int,int,int,int);
void dis_con();
void d_search();
void highlight(int,int);

/*declaration of main menu functions*/
void bill() ;
void edit();
void add();
void del();
void exit();

/*declaration of display submenu functions*/
void d_code();
void d_rate();
void d_quan();
void d_all();

/*start of main*/
int main()
{
 d_mainmenu();
 return 0;
}



void d_mainmenu()
{
 int i;
 char ch;
 const char *menu[]={"   Calculate Bill","   Add Goods","   Edit Goods","   Display All ","   Search", "   Delete Goods","   Exit"};
 system("cls");
 //textbackground(11);
 //textcolor(0);
 //_setcursortype(_NOCURSOR);
 window(25,50,20,32);
 gotoxy(33,18);printf("MAIN MENU");
 for (i=0;i<=6;i++){
  gotoxy(30,22+i+1);printf("%s\n\n\n",menu[i]);}
  curser(7);
 }

void d_search()
{
 char ch;
 int i;
    const char *menu[]={"   By Code","   By Rate","   By Quantity","   Back to main menu"};
 system("cls");
 //textbackground(11);
 //textcolor(0);
 window(25,50,20,32);
 gotoxy(33,18);printf("SEARCH MENU");
 for (i=0;i<=3;i++){
 gotoxy(30,22+i+1);printf("%s\n\n\n",menu[i]);}
 curser(4);
}

/*function for cursor movement*/
void curser(int no)
{
    int count=1;
    char ch='0';
    gotoxy(30,23);
 while(1){
  switch(ch){
   case 80:
    count++;
    if (count==no+1) count=1;
    break;
   case 72:
    count--;
    if(count==0) count=no;
    break;
  }
  highlight(no,count);
  ch=getch();
  if(ch=='\r'){
   if(no==7){
    if (count==1) bill() ;
    else if(count==2) add();
    else if(count==3) edit();
    else if (count==4) d_all();
    else if (count==5) d_search();
    else if (count==6) del();
    else   exit(0);
   }
   if(no==4){
    if (count==1) d_code();
    else if (count==2)d_rate();
    else if (count==3) d_quan();
    else d_mainmenu();
   }
  }
 }
}

void highlight(int no,int count)
{
 if (no==4){
  //textbackground(11);
  //textcolor(0);
  gotoxy(30,23);printf("   By Code          ");
  gotoxy(30,24);printf("   By Rate          ");
  gotoxy(30,25);printf("   By Quantity      ");
  gotoxy(30,26);printf("   Back to main menu");
  //textcolor(0);
  //textbackground(2);
  switch (count)
  {
   case 1:
    gotoxy(30,23);
    printf(" - By Code          ");
    break;
   case 2:
    gotoxy(30,24);
    printf(" - By Rate          ");
    break;
   case 3:
    gotoxy(30,25);
    printf(" - By Quantity      ");
    break;
   case 4:
    gotoxy(30,26);
    printf(" - Back to main menu");
    break;
  }
 }

 if(no==7){
  //textbackground(11);
  //textcolor(0);
  gotoxy (30,23);printf("   Calculate Bill ");
  gotoxy (30,24);printf("   Add Goods      ");
  gotoxy (30,25);printf("   Edit Goods     ");
  gotoxy (30,26);printf("   Display All    ");
  gotoxy (30,27);printf("   Search         ");
  gotoxy (30,28);printf("   Delete Goods   ");
  gotoxy (30,29);printf("   Exit           ");
  //textcolor(0);
  //textbackground(2);
  switch(count){
   case 1:
    gotoxy (30,23);
    printf(" - Calculate Bill ");
    break;
   case 2:
    gotoxy (30,24);
    printf(" - Add Goods      ");
    break;
   case 3:
    gotoxy (30,25);
    printf(" - Edit Goods     ");
    break;
   case 4:
    gotoxy (30,26);
    printf(" - Display All    ");
    break;
   case 5:
    gotoxy (30,27);
    printf(" - Search         ");
    break;
   case 6:
    gotoxy (30,28);
    printf(" - Delete Goods   ");
    break;
   case 7:
    gotoxy (30,29);
    printf(" - Exit           ");
    break;
  }
 }
}

void bill()
{
  char x[4]={0};
  int j=29,q=0,size=0,i=1;
  float total=0,gtotal=0;
  FILE *file;
  file=fopen("record.txt","r+b");
  rewind(file);
  system("cls");
  dbill();
  gotoxy(26,15);printf("enter  \"end\" to finish input");
  while(1){
  gotoxy(25,18);printf("                    ");
  gotoxy(25,19);printf("                    ");
  gotoxy(25,18);printf("enter item code:");
  scanf("%s",x);
  if(strcmp(x,"end")==0)
   break;
  gotoxy(25,19);printf("enter quantity:");
  scanf("%d",&q);
  rewind(file);
  while(fread(&item,sizeof(item),1,file)){
   if((strcmp(item.code,x)==0)){
    total=item.rate*q;
    gotoxy(11,j);printf("%4d",i);
    printf("%9s",item.name);
    printf("%13d",q);
    printf("%15.2f",item.rate);
    printf("%13.2f",total);
    gtotal=gtotal+total;
    size=sizeof(item);
    item.quantity=item.quantity-q;
    j+=2; i++;
    fseek(file,-size,SEEK_CUR);fwrite(&item,sizeof(item),1,file);
    break;
   }
    }
 }
 if(gtotal!=0){
  gotoxy(30,j+5);
  printf("TOTAL AMOUNT = NRs. %6.2f",gtotal);
 }
 fclose(file);
 getch();
 d_mainmenu();
}
 /*function to display bill window*/
void dbill()
{
 int i;
 gotoxy(20,10);
 //;
 for (i=1;i<=10;i++)
  printf("*");
 printf(" * FASHION WEAR * ");
 for (i=1;i<=10;i++)
        printf("*");
 printf("\n\n");
 gotoxy(30,11);printf("Departmental Store");
 //textcolor(1);
 gotoxy(32,25);printf("CUSTOMER'S BILL") ;
 //textcolor(8);
 gotoxy(13,27);printf("SN.   Item Name     Quantity     Rate          Total");

}
/*function to add records*/
void add ()
{
 FILE *file;
 char y[ACS],x[12];
 system("cls");
 //textbackground(11);
 //textcolor(0);
 gotoxy(25,25);printf("Enter new record(Y/N)?");
 while(toupper(getche())=='Y'){
  system("cls");
  file=fopen("record.txt","ab");
  c_code(y);
  strcpy(item.code,y);
  gotoxy(22,28);printf("Enter rate of the item:");
  scanf("%f",&item.rate);
  gotoxy(22,30);printf("Enter quantity of the item:");
  scanf("%d",&item.quantity);
  gotoxy(22,32);printf("Enter name of the item:");
  scanf("%s",item.name);
  fseek(file,0,SEEK_END);fwrite(&item,sizeof(item),1,file);
  fclose(file);
  gotoxy(22,34);printf("Enter new record(Y/N)?");

   }
   d_mainmenu();
}

 /*function to check availability of code*/
void c_code(char y[])
{
 int flag;
 FILE *file;
 file=fopen("record.txt","rb");
 while(1){
  system("cls");
  window(20,58,23,36);
  gotoxy(32,18);printf(" ADD ARTICLES ")  ;
  flag=1;
  rewind(file);
  gotoxy(22,25);printf("Enter new code of the article:");
  scanf(" %[^\n]",y);
  while(fread(&item,sizeof(item),1,file)==1){
   if (strcmp(y,item.code)==0){
    flag=0;
    gotoxy(26,30);printf("code already exists");
    gotoxy(29,32);printf("enter again");getch();
    break;
   }
  }
  if (flag==1)
  break;
 }
}

/*function for editing*/
void edit()
{
 int flag=0,choice;
 char x[ACS],y[ACS];
 FILE *file;
 int size;
 system("cls");
 //textcolor(0);
 //textbackground(11);
 window(20,63,20,46);
 gotoxy(35,18);printf("EDIT RECORDS");
 ;
 gotoxy(25,23);printf("enter item code: ");
 scanf("%s",x);
 flag=check(x);
 if(flag==0){
  file=fopen("record.txt","r+b");
  rewind(file);
  while (fread(&item,sizeof (item),1,file)){
   if(strcmp(item.code,x)==0){
    //textcolor(0);
    gotoxy(25,27);printf("name       = %s",item.name);
    gotoxy(25,28);printf("code       = %s",item.code);
    gotoxy(25,29);printf("rate       = %g",item.rate);
    gotoxy(25,30);printf("quantity   = %d",item.quantity);
    gotoxy(25,32);; printf("do you want to edit this record(y/n):");
    fflush(file);
    if(toupper(getche())=='Y'){
     //textcolor(0);
     gotoxy(25,34); printf("1- edit name ");
     gotoxy(25,35); printf("2- edit code ");
     gotoxy(25,36); printf("3- edit rate ");
     gotoxy(25,37); printf("4- edit quantity ");
     gotoxy(25,39);  ; printf(" enter your choice(1, 2, 3, 4) ");
     scanf("%d",&choice);
     switch(choice){
      case 1:
       system("cls");
       window(23,48,20,40);
       gotoxy(35,18);printf("EDIT RECORDS");
       gotoxy(25,24); printf(" enter new name: ");
       scanf("%s",item.name);
       size=sizeof(item);
       fseek(file,-size,SEEK_CUR);fwrite(&item,sizeof(item),1,file);
       break;
      case 2:
       system("cls");
       window(23,65,20,40);
       gotoxy(35,18);printf("EDIT RECORDS");
       gotoxy(25,24);
       c_code(y);
       strcpy(item.code,y);
       size=sizeof(item);
       fseek(file,-size,SEEK_CUR);fwrite(&item,sizeof(item),1,file);
       break;
      case 3:
       system("cls");
       window(23,65,20,40);
       gotoxy(35,18);printf("EDIT RECORDS");
       gotoxy(25,24);
       printf(" enter new rate: ");
       scanf("%f",&item.rate);
       size=sizeof(item);
       fseek(file,-size,SEEK_CUR);fwrite(&item,sizeof(item),1,file);
       break;
      case 4:
       system("cls");
       window(23,65,20,40);
       gotoxy(35,18);printf("EDIT RECORDS");
       gotoxy(25,24);
       printf(" enter new quantity: ");
       scanf("%d",&item.quantity);
       size=sizeof(item);
       fseek(file,-size,1);fwrite(&item,sizeof(item),1,file);
       break;
     }
     gotoxy(27,30);printf("--- item edited---");
     break;
    }
   }
  }
 }
 if (flag==1){
  gotoxy(32,30);printf("item does not exist");
  gotoxy(36,32);printf("TRY ABGAIN");
 }
 getch();
 fclose(file);
 d_mainmenu();
}

/*function to display all records*/
void d_all()
{
 int i,j=1;
 FILE *file;
 dis_con();
 file=fopen("record.txt","rb");
 rewind(file);
 i=26;
 fflush(file);
 while(fread(&item,sizeof(item),1,file)){
  display(&item,i,j);
  i++;
  j++;
  if ((j%20)==0){
         gotoxy(27,47);/*textcolor(0)*/;printf("press any key to see more...........");
         getch();
         system("cls");
         dis_con();
         i=26;
         continue;
  }
  }
  getch();
  if (i==26) {
  gotoxy(24,30); printf("-- no articles found --");
 }
 getch();
 fclose(file);
 d_mainmenu();
}

/*function to display by quantity*/
void d_quan()
{
  int i,j=1;
  int a,b;
  FILE *file;
  dis_con();
  file=fopen("record.txt","rb");
  rewind(file);
  i=26;
  gotoxy(16,20);;printf("enter lower range: ");
  scanf("%d",&a);
  gotoxy(16,21);printf("enter upper range:");
  scanf("%d",&b);
  fflush(file);
  while(fread(&item,sizeof(item),1,file)){
  if((item.quantity>=a)&&(item.quantity<=b)){
   display(&item,i,j);
   i++;
   j++;
   if ((j%20)==0){
    gotoxy(27,47);printf("press any key to see more...........");
    getch();
    system("cls");
    dis_con();
    i=26;
    continue;
   }
     }
  }
  getch();
  if (i==26){
  gotoxy(28,30); printf(" no item found ");
 }
 getch();
 d_search();
 fclose(file);
}

/*function to display by rate*/
void d_rate(){
  int i,j=1;
  float a,b;
  FILE *file;
  dis_con();
  file=fopen("record.txt","rb");
  rewind(file);
  i=26;
  gotoxy(16,20);;printf("enter lower range: ");
  scanf("%f",&a);
  gotoxy(16,21);printf("enter upper range: ");
  scanf("%f",&b);
  fflush(file);
  while(fread(&item,sizeof(item),1,file)){
  if((item.rate>=a)&&(item.rate<=b)){
   display(&item,i,j);
   i++;
   j++;
   if ((j%20)==0){
    gotoxy(27,47);printf("press any key to see more...........");
    getch();
    system("cls");
    dis_con();
    i=26;
    continue;
   }
  }
  }
 getch();
 if (i==26){
  gotoxy(28,30); printf(" no item found ");
 }
 getch();
 fclose(file);
 d_search();
}

/*function to display by code*/
void d_code()
{
  int i,j=1;
  char x[4]={0};
  FILE *file;
  dis_con();
  file=fopen("record.txt","rb");
  rewind(file);
  i=26;
  gotoxy(16,20);;printf("enter item code: ");
  scanf("%s",x);
  fflush(file);
  while(fread(&item,sizeof(item),1,file)){
  if((strcmp(item.code,x)==0)){
   display(&item,i,j);
   i++;
   j++;
   break;
  }
  }
  if (i==26){
  gotoxy(28,30); printf("no item found");
  }
  getch();
  fclose(file);
  d_search();
}

/*function to display window for item display*/
void dis_con()
{
 int i;
 system("cls");
 gotoxy(20,10);
 ;
 for (i=1;i<=10;i++)
  printf("*");
 printf(" * FASHION WEAR * ");
 for (i=1;i<=10;i++)
        printf("*");
 printf("\n\n");
 gotoxy(30,11);printf("Departmental Store");
 //textcolor(1);
 gotoxy(32,17);printf("RECORDS") ;
 //textcolor(8);
 gotoxy(18,23);printf ("SN   Item Name   Item Code      Rate     Quantity");
}

/*function to display in screen*/
void display(rec *item,int i,int j)
{
 gotoxy(16,i);//textcolor(13);
 printf("%4d",j);
 printf("%9s",item->name);
 printf("%12s",item->code);
 printf("%14.2f",item->rate);
 printf("%11d",item->quantity);
}

/*function to delete records*/
void del()
{
 int flag;
 char x[ANS];
 FILE *file,*file1;
 system("cls");
 //textbackground(11);
 //textcolor(0);
 window(23,51,25,34);
 gotoxy(29,18);printf("DELETE ARTICLES");
 gotoxy(27,27);printf("enter item code: ");
 scanf("%s",x);
 flag=check(x);
 if(flag==0){
  file1=fopen("record1.txt","ab");
  file=fopen("record.txt","rb");
  rewind(file);
  while (fread(&item,sizeof (item),1,file)){
   if(strcmp(item.code,x)!=0)
    fwrite(&item,sizeof(item),1,file1);
  }
  gotoxy(27,29);printf("---item deleted---");
  remove("record.txt");
  rename("record1.txt","record.txt");
 }
 if (flag==1){
  gotoxy(25,29);printf("---item does not exist---");
  gotoxy(30,31);printf("TRY AGAIN");
 }
 fclose(file1);
 fclose(file);
 getch();
 d_mainmenu();
}

/*function to check validity of code while editing and deleting*/
int check(char x[ANS])
{
 FILE *file;
 int flag=1;
 file=fopen("record.txt","rb");
 rewind(file);
 while (fread(&item,sizeof (item),1,file)){
  if(strcmp(item.code,x)==0){
   flag=0;
   break;
  }
 }
 fclose(file);
 return flag;
 }

/*function to display box*/
void window(int a,int b,int c,int d)
{
 int i;
 system("cls");
 gotoxy(20,10);
 //textcolor(1);
 for (i=1;i<=10;i++)
  printf("*");
 printf(" * FASHION WEAR * ");
 for (i=1;i<=10;i++)
        printf("*");
 printf("\n\n");
 gotoxy(30,11);printf("Departmental Store");
 //textcolor(4);
 for (i=a;i<=b;i++){
        gotoxy(i,17);printf("\xcd");
        gotoxy(i,19);printf("\xcd");
        gotoxy(i,c);printf("\xcd");
        gotoxy(i,d);printf("\xcd");
        }

 gotoxy(a,17);printf("\xc9");
 gotoxy(a,18);printf("\xba");
 gotoxy(a,19);printf("\xc8");
 gotoxy(b,17);printf("\xbb");
 gotoxy(b,18);printf("\xba");
 gotoxy(b,19);printf("\xbc");
 //textcolor(4);
 for(i=c;i<=d;i++){
  gotoxy(a,i);printf("\xba");
  gotoxy(b,i);printf("\xba");
 }
 gotoxy(a,c);printf("\xc9");
 gotoxy(a,d);printf("\xc8");
 gotoxy(b,c);printf("\xbb");
 gotoxy(b,d);printf("\xbc");
 //textbackground(11);
 //textcolor(0);
}

You can download the source code here.