The project aims at developing an inventory management system using the C language that enables an organization to maintain its inventory.
The project inventory management system demonstrates the creation of a user interface of a system, without the use of C Graphics library. The application uses basic C functions to generate menus, show message boxes and print text on the screen. To display customized text with colors and fonts according to application requirements, functions have been created in the application, which fetch the exact video memory addresses of a target location, to write text at the particular location.
The application also implements the concept of structures to define the inventory items. It also effectively applies the various C concept, such as file operations, looping and branching constructs and string manipulation functions.
The Source Code Of The Application Inventory Management System is Given Below:
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/***** Application: Inventory Management System Coded By: Krishna Keshab Chaudhary Copyrite at: BESTENGINEERINGPROJECTS.COM *****/ #include <conio.h> #include <stdio.h> #include <stdlib.h> #include <dos.h> #include <graphics.h> #include <string.h> #define TRUE 1 #define FALSE 0 /***** List of Global variable uses in the application*****/ int mboxbrdrclr,mboxbgclr,mboxfgclr; /*To set colors for all message boxes in the application*/ int menutxtbgclr,menutxtfgclr,appframeclr; /*To set the frame and color's for menu item's*/ int section1_symb,section1_bgclr,section1_fgclr; /*To set the color of section 1, the region around the menu options*/ int section2_symb,section2_bgclr,section2_fgclr; /*To set color of section 2, the section on the right of the menu options*/ int fEdit; int animcounter; static struct struct_stock /*Main database structure*/ { char itemcode[8]; char itemname[50]; float itemrate; float itemqty; int minqty; /*Used for Record level, which is the minimum no of stock*/ }inv_stock; struct struct_bill { char itemcode[8]; char itemname[50]; float itemrate; float itemqty; float itemtot; } item_bill[100]; char password[8]; const long int stocksize=sizeof(inv_stock); /*stocksize stores the size of the struck_stock*/ float tot_investment; int numItems; /*to count the no of the items in the stock*/ int button,column,row; /*To allow mouse operation in the application*/ FILE *dbfp; /*To perform database file operation on "inv_stock.dat"*/ int main(void) { float issued_qty; char userchoice,code[8]; int flag,i,itemsold; float getInvestmentInfo(void); FILE *ft; int result; int gd=DETECT,gm,x,y; initgraph(&gd,&gm,"c:\\turboc3\\bgi"); getConfiguration(); /* Opens & set 'dbfp' globally so that it is accessible from anywhere in the application*/ dbfp=fopen("c:\\turboc3\invstoc.dat","r+"); if(dbfp==NULL) { clrscr(); printf("\nDatabase dos not exists.\nPress Enter key to create it. To exit, press any other key.\n"); fflush(stdin); if(getch()==13) { dbfp=fopen("c:\\turboc3\invstoc.dat","w+"); printf("\nThe database for the application has been created.\nYou most restart the application.\nPress any key to continue.\n"); fflush(stdin); getch(); exit(0); } else { exit(0); } } /* Application control will reach here only if the database file has been opened successfully*/ if(initmouse()==0) messagebox(10,33,"Mouse could not be loaded.","Error",mboxbrdrclr,mboxbgclr,mboxfgclr,0); showmouseptr(); _setcursortype(_NOCURSOR); while(1) { clrscr(); fEdit=FALSE; ShowMenu(); numItems=0; rewind(dbfp); /* To calculate the number of records in the database*/ while(fread(&inv_stock,stocksize,1,dbfp)==1) ++numItems; textcolor(menutxtfgclr); textbackground(menutxtbgclr); gotopos(23,1); textcolor(BLUE); printf("Total Items in Stock: %d",numItems); textcolor(BLUE); //testbackground(BROWN); fflush(stdin); /*The application will wait for user response*/ userchoice=getUserResponse(); switch(userchoice) { /* To close the application*/ case '0': BackupDatabase(); /*Backup the Database file to secure data*/ flushall(); fclose(dbfp); fcloseall(); print2screen(12,40,"Thanks for Using the application.",BROWN,BLUE,0); sleep(1); setdefaultmode(); exit(0); /*To Add an item*/ case '1': if(getdata()==1) { fseek(dbfp,0,SEEK_END); /*Write the item information into database*/ fwrite(&inv_stock,stocksize,1,dbfp); print2screen(13,33,"The item has been successfully added.",BROWN,BLUE,0); getch(); } break; /*To edit the item information*/ case '2': print2screen(2,33,"Enter Item Code>",BROWN,BLUE,0);gotopos(2,54);fflush(stdin); scanf("%s",&code); fEdit=TRUE; if(CheckId(code)==0) { if(messagebox(0,33,"Press Enter key to edit the item.","Confirm",mboxbrdrclr,mboxbgclr,mboxfgclr,0)!=13) { messagebox(10,33,"The item information could not be modified. Please try again.","Edit",mboxbrdrclr,mboxfgclr,mboxfgclr,0); fEdit=FALSE; break; } fEdit=TRUE; getdata(); fflush(stdin); fseek(dbfp,-stocksize,SEEK_CUR); fwrite(&inv_stock,stocksize,1,dbfp); } else messagebox(10,33,"The item is not available in the database.","No record found",mboxbrdrclr,mboxbgclr,mboxfgclr,0); fEdit=FALSE; break; /* To show the information about an Item*/ case '3': print2screen(2,33,"Enter Item Code: ",BROWN,BLUE,0);gotopos(2,55);fflush(stdin); scanf("%s",&code); flag=0; rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) { if(strcmp(inv_stock.itemcode,code)==0) { DisplayItemInfo(); flag=1; } } if(flag==0) messagebox(10,33,"The item is not available.","No records found",mboxbrdrclr,mboxbgclr,mboxfgclr,0); break; /* To show information about all items in the database*/ case '4': if(numItems==0) messagebox(10,33,"No items are available.","Error",mboxbrdrclr,mboxbgclr,mboxfgclr,0); textcolor(BLUE); textbackground(BROWN); gotopos(3,33); cprintf("Number of items Available in Stock: %d",numItems); gotopos(4,33); getInvestmentInfo(); cprintf("Total Investment : Rs.%2f",tot_investment); gotopos(5,33); cprintf("Press Enter To View. Otherwise Press Any Key...");fflush(stdin); if(getch()==13) { rewind(dbfp); rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1);/*List All Record*/ DisplayItemRecord(inv_stock.itemcode); } textcolor(BLUE); break; /*To issue Items*/ case '5': itemsold=0; i=0; top: print2screen(3,33,"Enter Item Code: ",BROWN,BLUE,0);fflush(stdin);gotopos(3,55); scanf("%s",&code); if(CheckId(code)==1) if(messagebox(10,33,"The item is not available.","No record found",mboxbrdrclr,mboxbgclr,mboxfgclr,0)==13) goto top; else goto bottom; rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) { if(strcmp(inv_stock.itemcode,code)==0) /* To check if the item code is available in the database*/ { issued_qty=IssueItem(); if(issued_qty > 0) { itemsold+=1; strcpy(item_bill[i].itemcode,inv_stock.itemcode); strcpy(item_bill[i].itemname,inv_stock.itemname); item_bill[i].itemqty=issued_qty; item_bill[i].itemrate=inv_stock.itemrate; item_bill[i].itemtot=inv_stock.itemrate*issued_qty; i+=1; } print2screen(19,33,"Would you like to issue another item(Y/N)?",BROWN,BLUE,0);fflush(stdin);gotopos(19,45); if(toupper(getch())=='Y') goto top; bottom: break; } } break; /*item to order*/ case '6': if(numItems<=0) { messagebox(10,33,"No items are available.","Items Not Found",mboxbrdrclr,mboxbgclr,mboxfgclr,0); break; } print2screen(3,33,"Stock of these items is on the minimum level:",BROWN,RED,0);fflush(stdin); flag=0; fflush(stdin); rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) { if(inv_stock.itemqty <= inv_stock.minqty) { DisplayItemInfo(); flag=1; } } if(flag==0) messagebox(10,33,"No item is currently at record level.","Record Items",mboxbrdrclr,mboxbgclr,mboxfgclr,0); break; default: messagebox(10,33,"The option you have entered is not available.","Invalid Option",mboxbrdrclr,mboxbgclr,mboxfgclr,0); break; } } } /*Display Menu & Skins that the user will see*/ ShowMenu() { if(section1_bgclr != BROWN || section1_symb != ' ') fillcolor(2,1,23,39,section1_symb,section1_bgclr,section1_fgclr,0); if(section2_bgclr != BROWN || section2_symb != ' ') fillcolor(2,40,23,79,section2_symb,section2_bgclr,section2_fgclr,0); print2screen(2,2,"1: Add an item",menutxtbgclr,menutxtfgclr,0); print2screen(4,2,"2: Edit Item Information",menutxtbgclr,menutxtfgclr,0); print2screen(6,2,"3: Show Item Information",menutxtbgclr,menutxtfgclr,0); print2screen(8,2,"4: View Stock Report",menutxtbgclr,menutxtfgclr,0); print2screen(10,2,"5: Issue Items from Stock",menutxtbgclr,menutxtfgclr,0); print2screen(12,2,"6: View Items to be Ordered",menutxtbgclr,menutxtfgclr,0); print2screen(14,2,"7: Close The Application",menutxtbgclr,menutxtfgclr,0); htskin(0,0,' ',80,appframeclr,LIGHTGREEN,0); htskin(1,0,' ',80,appframeclr,LIGHTGREEN,0); vtskin(0,0,' ',24,appframeclr,LIGHTGREEN,0); vtskin(0,79,' ',24,appframeclr,LIGHTGREEN,0); htskin(24,0,' ',80,appframeclr,LIGHTGREEN,0); vtskin(0,31,' ',24,appframeclr,LIGHTGREEN,0); return; } /*Wait for response from the user & returns choice*/ getUserResponse() { int ch,i; animcounter=0; while(!kbhit()) { getmousepos(&button,&row,&column); /*To Show Animation*/ BlinkTest(0,20,"Inventory Management System",1,YELLOW,RED,LIGHTGRAY,0,50); animcounter+=1; i++; if(button==1 &&row==144 && column>=16 && column<=72)/*Close*/ return('0'); if(button==1 &&row==16 && column>=16 && column<=136)/*Add new menu*/ return('1'); if(button==1 &&row==32 && column>=16 && column<=144)/*Edit item*/ return('2'); if(button==1 &&row==48 && column>=16 && column<=160)/*Show an item*/ return('3'); if(button==1 &&row==64 && column>=16 && column<=104)/*Stock Report*/ return('4'); if(button==1 &&row==80 && column>=16 && column<=144)/*Issue an item*/ return('5'); if(button==1 &&row==96 && column>=16 && column<=152)/*Items to order*/ return('6'); } ch=getch(); return ch; } /* Read a valid id and its information,return 0 if id already exits */ getdata() { char tmp[8]; float tst; //_setcursertype(_NORMALCURSOR); print2screen(3,33,"Enter Item Code: ",BROWN,BLUE,0);fflush(stdin);gotopos(3,53); scanf("%s",&tmp); if(CheckId(tmp)==0 && fEdit == FALSE) { messagebox(10,33,"The id already exists. ","ERROR",mboxbrdrclr,mboxbgclr,mboxfgclr,0); return 0; } strcpy(inv_stock.itemcode,tmp); /*Means got a correct item code*/ print2screen(4,33,"Name of the Item: ",BROWN,BLUE,0);fflush(stdin);gotopos(4,53); gets(inv_stock.itemname); print2screen(5,33,"Price of Each Unit: ",BROWN,BLUE,0);fflush(stdin);gotopos(5,53); scanf("%f",inv_stock.itemrate); print2screen(6,33,"Quantity: ",BROWN,BLUE,0);fflush(stdin);gotopos(6,53); scanf("%f",inv_stock.itemqty); print2screen(7,33,"Record Level: ",BROWN,BLUE,0);fflush(stdin);gotopos(7,53); scanf("%d",inv_stock.minqty); _setcursortype(_NOCURSOR); return 1; } /* Returns 0 if the id already exists in the database, else returns 1*/ int CheckId(char item[8]) { rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) if(strcmp(inv_stock.itemcode,item)==0) return(0); return(1); } /*Display an Item*/ DisplayItemRecord(char idno[8]) { rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) if(strcmp(idno,inv_stock.itemcode)==0) DisplayItemInfo(); return; } /*Display and item information*/ DisplayItemInfo() { int r=7; //textcolor(menutxtfgclr); //testbackground(menutxtbgclr); gotopos(r,33); cprintf("Item Code: %s"," "); gotopos(r,33); cprintf("Item Code: %s",inv_stock.itemcode); gotopos(r+1,33); cprintf("Name of the Item: %s"," "); gotopos(r+1,33); cprintf("Name of the Item: %s",inv_stock.itemname); gotopos(r+2,33); cprintf("Price of each unit: %.2f"," "); gotopos(r+2,33); cprintf("Price of each unit: %.2f",inv_stock.itemrate); gotopos(r+3,33); cprintf("Quantity in Stock: %.4f"," "); gotopos(r+3,33); cprintf("Quantity in Stock: %.4f",inv_stock.itemqty); gotopos(r+4,33); cprintf("Record Level: %d:"," "); gotopos(r+4,33); cprintf("Record Level: %d:",inv_stock.minqty); gotopos(r+5,33); cprintf("\nPress Any Key...");fflush(stdin);getch(); //testbackground(BROWN); textcolor(BLUE); return; } /* This function will return 0 if an item cannot issued, else issued the item */ IssueItem() { float issueqnty; DisplayItemInfo(); print2screen(15,33,"Enter Quantity: ",BROWN,BLUE,0);fflush(stdin);gotopos(15,49); scanf("%f,&issueqnty"); /*If the stock of the item is greater then minimum stock */ if((inv_stock.itemqty - issueqnty) <= inv_stock.minqty) { textcolor(BLUE); //testbackground(BROWN); gotopos(18,33); cprintf("%.4f Item(s) issued.",issueqnty); gotopos(19,33); cprintf("You should pay RS. %.2f",issueqnty*inv_stock.itemrate);getch(); textcolor(BLUE); inv_stock.itemqty-=issueqnty; /* Updating quantity for the item in stock */ fseek(dbfp,-stocksize,SEEK_CUR); fwrite(&inv_stock,stocksize,1,dbfp); return issueqnty; } /* if the stock of the item is less than minimum stock. ie Record Level */ else { messagebox(10,33,"Insufficient quantity in stock.","Insufficient Stock",mboxbrdrclr,mboxbgclr,mboxfgclr,0); gotopos(17,33); textcolor(BLUE); ////testbackground(BROWN); cprintf("ONLY %.4f piece of the item can be issued.",inv_stock.itemqty-inv_stock.minqty); gotopos(18,33); cprintf("Press Any Key...");getch(); textcolor(BLUE); ////testbackground(BROWN); return 0; } } /* Calculate the total investment amount for the stock available */ float getInvestmentInfo(void) { tot_investment=0; rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) tot_investment+=(inv_stock.itemrate*inv_stock.itemqty); return tot_investment; } /* Creates a backup file "Backup" of "inv_stock.dat" */ BackupDatabase(void) { FILE *fback; fback=fopen("d:/Backup.dat","w"); rewind(dbfp); while(fread(&inv_stock,stocksize,1,dbfp)==1) fwrite(&inv_stock,stocksize,1,fback); fclose(fback); return; } /* This structure is used color setting for the application */ struct colors { char cfg_name[10]; int mboxbrdrclr; int mboxbgclr; int mboxfgclr; int menutxtbgclr; int menutxtfgclr; int appframeclr; int section1_symb; int section1_bgclr; int section1_fgclr; int section2_symb; int section2_bgclr; int section2_fgclr; }clr; const long int clrsize=sizeof(clr); /* Gets the display configuration for the application */ getConfiguration() { FILE *flast; flast=fopen("lastcfg","r+"); if(flast==NULL) { SetDefaultColor(); return 0; } rewind(flast); /* Reads the first record. */ fread(&clr,clrsize,1,flast); #ifdef OKEY if(strcmp(clr.cfg_name,"lastclr")!=0) { SetDefaultColor(); fclose(flast); return 0; } #endif mboxbrdrclr=clr.mboxbrdrclr;mboxbgclr=clr.mboxbgclr;mboxfgclr=clr.mboxfgclr; menutxtbgclr=clr.menutxtbgclr;menutxtfgclr=clr.menutxtfgclr;appframeclr=clr.appframeclr; section1_symb=clr.section1_symb;section1_bgclr=clr.section1_bgclr;section1_fgclr=clr.section1_fgclr; section2_symb=clr.section2_symb;section2_bgclr=clr.section2_bgclr;section2_fgclr=clr.section2_fgclr; fclose(flast); return 1; } /* Sets the default color setting for the application */ SetDefaultColor() { mboxbrdrclr=BLUE,mboxbgclr=GREEN,mboxfgclr=WHITE; menutxtbgclr=BROWN,menutxtfgclr=BLUE,appframeclr=CYAN; section1_symb=' ',section1_bgclr=BROWN,section1_fgclr=BLUE; section2_symb=' ',section2_bgclr=BROWN,section2_fgclr=BLUE; return 1; } /* Adds animation to a text */ BlinkTest(const int r,const int c,char txt[],int bgclr,int fgclr,int BGCLR2,int FGCLR2,int blink,const int dly) { int len=strlen(txt); BGCLR2=bgclr;FGCLR2=BLUE; htskin(r,c,' ',len,bgclr,bgclr,0); print2screen(r,c,txt,bgclr,fgclr,blink); write2screen(r,c+animcounter+1,txt[animcounter],BGCLR2,FGCLR2,0); write2screen(r,c+animcounter+2,txt[animcounter+1],BGCLR2,FGCLR2,0); write2screen(r,c+animcounter+3,txt[animcounter+2],BGCLR2,FGCLR2,0); write2screen(r,c+animcounter+4,txt[animcounter+3],BGCLR2,FGCLR2,0); write2screen(r,c+animcounter+5,txt[animcounter+4],BGCLR2,FGCLR2,0); write2screen(r,c+animcounter+6,txt[animcounter+5],BGCLR2,FGCLR2,0); delay(dly*2); write2screen(r,c+animcounter+1,txt[animcounter],bgclr,fgclr,0); write2screen(r,c+animcounter+2,txt[animcounter+1],bgclr,fgclr,0); write2screen(r,c+animcounter+3,txt[animcounter+2],bgclr,fgclr,0); write2screen(r,c+animcounter+4,txt[animcounter+3],bgclr,fgclr,0); write2screen(r,c+animcounter+5,txt[animcounter+4],bgclr,fgclr,0); write2screen(r,c+animcounter+6,txt[animcounter+5],bgclr,fgclr,0); animcounter+=1; if(animcounter+5 >= len) animcounter=0; return; } /* Display a single character with its attrribute */ write2screen(int row,int col,char ch,int bg_color,int fg_color,int blink) { int attr; char far *v; char far *ptr=(char far*)0xB8000000; if(blink!=0) blink=128; attr=bg_color+blink; attr=attr<<4; attr+=fg_color; attr=attr|blink; v=ptr+row*160+col*2; /* Calculate the video memory address corresponding to row & column */ *v=ch; v++; *v=attr; return 0; } /* Prints text with color attribute direct to the screen */ print2screen(int row,int col,char string[],int bg_color,int fg_color,int blink) { int i=row,j=col,strno=0,len; len=strlen(string); while(j<80) { j++; if(j==79) { j=0; i+=1; } write2screen(i,j,string[strno],bg_color,fg_color,blink); /*See below function*/ strno+=1; if(strno > len-1) break; } return; } /* Prints text horizontally */ htskin(int row,int column,char symb,int no,int bg_color,int fg_color,int blink) { int i; for(i=0;i<no;i++) write2screen(row,column++,symb,bg_color,fg_color,blink); /*Print one symbol */ return; } /* print text vertically */ vtskin(int row,int column,char symb,int no,int bg_color,int fg_color,int blink) { int i; for(i=0;i<no;i++) write2screen(row++,column,symb,bg_color,fg_color,blink); /* Print one symbol */ return; } /* Shows a message box */ messagebox(int row,int column,char message[50],char heading[10],char symb,int borderclr,int bg_color,int fg_color,int blink) { int len; char key,image[1000]; len=strlen(message); capture_image(row,column,row+3,column+len+7,&image); draw_mbox(row,column,row+3,column+len+7,symb,symb,borderclr,YELLOW,blink,borderclr,YELLOW,blink); fillcolor(row+1,column+1,row+2,column+len+6,' ',bg_color,bg_color,0); print2screen(row+1,column+2,message,bg_color,fg_color,blink); print2screen(row+2,column+2,"Press Any Key...",bg_color,fg_color,blink); print2screen(row,column+1,heading,borderclr,fg_color,blink); sound(400); delay(200); nosound(); fflush(stdin); key=getch(); put_image(row,column,row+3,column+len+7,&image); return key; } /* Fills color in a region */ fillcolor(int top_row,int left_column,int bottom_row,int right_column,char symb,int bg_color,int fg_color,int blink) { int i,j; for(i=top_row;i<=bottom_row;i++) htskin(i,left_column,symb,right_column-left_column+1,bg_color,fg_color,blink); return; } /* Prints a message box with an appropriate mesage */ draw_mbox(int trow,int tcolumn,int brow,int bcolumn,char hsymb,char vsymb,int hbg_color,int hfg_color,int hblink,int vbg_color,int vfg_color,int vblink) { htskin(trow,tcolumn,hsymb,bcolumn-tcolumn,hbg_color,hfg_color,hblink); htskin(brow,tcolumn,hsymb,bcolumn-tcolumn,hbg_color,hfg_color,hblink); vtskin(trow,tcolumn,vsymb,brow-trow+1,vbg_color,vfg_color,vblink); vtskin(trow,bcolumn,vsymb,brow-trow+1,vbg_color,vfg_color,vblink); return; } /* Copies the txt mode image below the messagebox */ capture_image(int toprow,int leftcolumn, int bottomrow,int rightcolumn,int *image) { char far *vidmem; int i,j,count; count=0; for(i=toprow;i<=bottomrow;i++) for(j=leftcolumn;j<=rightcolumn;j++) { vidmem=(char far*)0xB8000000+(i*160)+(j*2); /* Calculates the video memory address corresponding to row & column */ image[count]=*vidmem; image[count+1]=*(vidmem+1); count+=2; } return; } /* Place an image on the screen */ put_image(int toprow,int leftcolumn,int bottomrow,int rightcolumn,int image[]) { char far *ptr=(char far*)0xB8000000; char far *vid; int i,j,count; for(i=toprow;i<=bottomrow;i++) for(j=leftcolumn;j<=rightcolumn;j++) { vid=ptr+(i*60)+(j*2); /* Calculates the video memory address corresponding to row & column */ *vid=image[count]; *(vid+1)=image[count+1]; count+=2; } return; } /* To move the curser position to desired position*/ gotopos(int r,int c) { union REGS i,o; i.h.ah=2; i.h.bh=0; i.h.dh=r; i.h.dl=c; int86(16,&i,&o); return 0; } union REGS i,o; /* Initialize the mouse */ initmouse() { i.x.ax=0; int86(0x33,&i,&o); return(o.x.ax); } /* Show the mouse pointer */ showmouseptr() { i.x.ax=1; int86(0x33,&i,&o); return; } /* Get the mouse position */ getmousepos(int *button,int *x,int *y) { i.x.ax=3; int86(0x33,&i,&o); *button=o.x.bx; *x=o.x.dx; *y=o.x.cx; return 0; } /* Restores the default text mode */ setdefaultmode() { set25x80(); setdefaultcolor(); return; } /* Set the default color and courser of screen */ setdefaultcolor() { int i; char far *vidmem=(char far*)0xb8000000; window(1,1,80,25); clrscr(); for(i=1;i<4000;i+=2) *(vidmem+i)=7; _setcursortype(_NORMALCURSOR); return; } /* Sets 25x80 Text mode */ set25x80() { asm mov ax,0x0003; asm int 0x10; return; } |