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A C program for electronic voting machine!

Hello guys,
          Today I would like to share with all of you, my first mini project which I had done a few years ago when I was a beginner to the Programming world.
          This is a simple C program which mainly illustrates the file handling operations in C. I have explained the code with the comments.
          I hope you like it. :)

//        CODE         BEGINS

/*C program for smart voter*/

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

#define VTR_MAX_CNT 5 /*      Maximum number of votes to be casted
Depends on the User           */

void cast_vote();     /*Declaring function to cast vote*/

void winner();          /*Function to declare the winner*/

/*          Variable to check the repetition of voter's ID,
                  if the entered Voter's ID exists
*/

char repeat[10][30];

int FLAG=0;     /*Boolean variable to note down the existence of
voter's ID*/

/*A variable to keep track of total number of votes casted*/
int tot_vte=0;

/*Party variables all initialized to zero*/

int PARTY1 = 0,PARTY2 = 0,PARTY3 = 0,PARTY4 = 0,PARTY5 = 0;

/*          The following variables are used in order to
            check the existence of voter's ID
*/

char str1[20],str2[20];
char a[20],b[10][20];
int n[10]={0};

int r=0;    /* This variable is used as an index for the repeat     variable*/

FILE *ptr;        /*File pointer of the file containing the
                        list of voter's ID of that zone*/


/*    Function main begins    */
int main()
{
int i=0,k;  /* Index variables*/
int terminate;

ptr=fopen("vtrid.txt","r");   /*    Opening the file which contains
Voters IDs  */

/*
      A do while loop to:
            1) Check the existence of the voter's ID.
            2) Check for repetition of the entered voter's ID.
            3) To call the function which casts vote
*/


do
{           /*    DO WHILE OPENS         */

//clrscr(); Use this function in case you’re using Turbo C

/*    A LABEL associated with a goto statement, in case the entered voter's ID does not exist or
            if it is entered wrongly
*/

RE_ENTER:

/*    Voter's ID is being entered   */

printf("\nEnter the Voter's ID\n");
gets(str1);




/*    Process of checking for the existance of file   */

if(ptr==NULL)
      {
      printf("File not found\n");
      exit(0);
      }
else
    {
    printf("File found\n");
      }


/*    Process of copying the contents of the
             file containing voter's ID
*/

while(!feof(ptr))
{
fscanf(ptr,"%s",str2);
strcpy(b[i],str2);
i++;
}

strcpy(a,str1);



/*Checking for existence of the entered voter's ID*/

for(i=0;i<VTR_MAX_CNT;i++)
      {
      n[i]=strcmp(a,b[i]);
      }

for(i=0;i<VTR_MAX_CNT;i++)
      {
      if(n[i]==0)
            {
            FLAG=1;           /*Entered voter's ID exists*/
            break;
            }
      else
            {
            FLAG=0;           /*Entered voter's ID either does not exist or
                              if it is incorrect*/
            }
      }

/*    IF THE ENTERED VOTER'S ID EXISTS    */

if(FLAG==1)
      {     /* Check for repetition of the entered voter's ID     */

    if(tot_vte>0)
        {

                for(k=0;k<VTR_MAX_CNT;k++)
                        {
                              if(strcmp(str1,repeat[k])==0)
                    {
                        printf("This voter's ID is repeated\a\t\t\a\t\t\a");goto RE_ENTER;
                    }

                        }

            }


      printf("Voter's ID found");
      cast_vote();         /*Casting vote*/

      }
else            /*If the entered Voter's ID is invalid      */
      {
printf("Voter's ID not found\n\a\a");

      }

i=0;
strcpy(repeat[r],str1);
r++;

fflush(stdin);


}/*   DO WHILE CLOSES*/

while(tot_vte<VTR_MAX_CNT);

/*  The do-while continues until
    all the votes are casted or,
      The program is terminated forcefully
*/

printf("Thank you very much for voting\n");
printf("The voting process in this zone is complete\n");
winner();

getch();
fclose(ptr);

return 0;
}



/*Defining Cast Vote function*/

void cast_vote()
{
int choice;
printf("\nPlease cast your precious votes to one of the following parties\n");
printf("1.PARTY1\n2.PARTY2\n3.PARTY3\n4.PARTY4\n5.PARTY5\n");
scanf("%d",&choice);

//Increment the value of the respective party variable
switch(choice)
{
case 1:printf("Your Precious vote has been casted to PARTY1\n");
      PARTY1++;
      tot_vte++;
      break;

case 2:printf("Your Precious vote has been casted to PARTY2\n");
      PARTY2++;
      tot_vte++;
      break;

case 3:printf("Your Precious vote has been casted to PARTY3\n");
      PARTY3++;
      tot_vte++;
      break;

case 4:printf("Your Precious vote has been casted to PARTY4\n");
      PARTY4++;
      tot_vte++;
      break;

case 5:printf("Your Precious vote has been casted to PARTY5\n");
      PARTY5++;tot_vte++;
      break;

default:printf("Please re-enter your vote\n");
      cast_vote();
}

return; //Return the control back to the main() function
}

/*
      DEFINING THE FUNCTION TO DECLARE WINNER AND
      DISPLAY THE TOTAL NUMBER OF VOTES PER PARTY
*/

void winner()
{

/*    Displaying the total number of votes per party  */
printf("The total number of votes for PARTY1 is %d\n",PARTY1);
printf("The total number of votes for PARTY2 is %d\n",PARTY2);
printf("The total number of votes for PARTY3 is %d\n",PARTY3);
printf("The total number of votes for PARTY4 is %d\n",PARTY4);
printf("The total number of votes for PARTY5 is %d\n",PARTY5);

/*    Displaying the winner   */
//It is goof to use any sorting algorithm such as Quick or Merge sort
//can be used in order to find the winner instead of this approach

printf("PARTY2RATULATIONS!!!\a\n");
if(PARTY1>PARTY2 && PARTY1>PARTY3 && PARTY1>PARTY4 && PARTY1>PARTY5) printf("The winner is PARTY1!!\n");
else if(PARTY2>PARTY1 && PARTY2>PARTY3 && PARTY2>PARTY4 && PARTY2>PARTY5) printf("The winner is PARTY2!!\n");
else if(PARTY3>PARTY1 && PARTY3>PARTY2 && PARTY3>PARTY4 && PARTY3>PARTY5) printf("The winner id PARTY3!!\n");
else if(PARTY4>PARTY1 && PARTY4>PARTY2 && PARTY4>PARTY3 && PARTY4>PARTY5) printf("The winner is PARTY4!!\n");
else printf("The winner is PARTY5!!\n");

return;
}
/*    END OF THE PROGRAM      */




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