Question

Using C language, write a program for the following:

In a student representative council election, there are ten (10) candidates. A voter is required to vote a candidate of his/her choice only once. The vote is recorded as a number from 1 to 10. The number of voters are unknown beforehand, so the votes are terminated by a value of zero (0). Votes not within and not inclusive of the numbers 1 to 10 are invalid (spoilt) votes.

A file, electionVotes.txt contains the names of the candidates. The first full name is given as candidate 1, the second as candidate 2 and so forth. The names are followed by the number of votes for the candidate. Write a program to read the data and evaluate the results of the election. Print all the output to a file called electionResults.txt. Your output should specify the total number of votes, the number of invalid votes, and the number of spoilt votes. This is followed on by the votes received by each candidate and the winners of the election.

Suppose you are given the following data in the file with 7 candidates, electionVotes.txt

Victor Taylor Denise Duncan Kamal Ramdhan Michael Ali Anisa Sawh Carol Khan Garry Oliverie 312543535328167735 693 471 24 5 5 1 40

Your program should send the following output to the file, electionResults.txt

Answer 1

C code:

// header files
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
// main function
int main() {
   // opening file to read
   FILE *fp = fopen("electionVotes.txt","r");
   if(fp == NULL) {
       printf("Error while file opening!\n");
       exit(0);
   }
   // opening file to write
   FILE *out = fopen("electionResults.txt","w");
   if(out == NULL) {
       printf("Error while file opening!\n");
       exit(0);
   }
   // line for reading line by line
   char *line = (char*)malloc(10000*sizeof(char));
   int numOfPerson = 0; // for number of competitors
   char names[100][100]; // for storing names
   // reading line by line
   while (fgets(line, 10000, fp) != NULL) {
       if(line[strlen(line)-1] == '\n') // remove new line if the line contains it at last
           line[strlen(line)-1] = '\0';
       strcpy(names[numOfPerson++], line); // store the names
   }
    fclose(fp); // closing the file
   numOfPerson--; // remove last line which is votes
   int votes[100] = {0}; // for counting number of votes
   int numOfVoters = 0, validVotes = 0; // for counting number of voters
   char *word; // split last line of input file with respect to white space
    word = strtok(line, " "); // splitting
   while( word != NULL ) {
       int vote = atoi(word); // converting to int
       if(vote == 0) // if it is last vote then break
           break;
       if(vote > numOfPerson) // if vote number is greater than number of competitors then invalid
           fprintf(out,"Invalid vote %d\n",vote);
       else {
           votes[vote]++; // otherwise count the vote
           validVotes++; // increase valid vote by 1
       }
       numOfVoters++; // increase total vote by 1
       word = strtok(NULL, " "); // get next vote as string
    }
    // printing the vote details
   fprintf(out,"Number of voters: %d\n",numOfVoters);
   fprintf(out,"Number of valid votes: %d\n",validVotes);
   fprintf(out,"Number of spoilt votes: %d\n\n",numOfVoters-validVotes);
   int mx = -1; // for finding max vote
   // printing individual votes and calculate max vote
   fprintf(out,"Candidate Score\n");
   for(int i=1;i<=numOfPerson;i++) {
       fprintf(out,"%s %d\n",names[i-1],votes[i]);
       if(mx < votes[i]) // update max vote
           mx = votes[i];
   }
   // print all names as winners which have max number of votes
   fprintf(out,"\nWinner(s):\n");
   for(int i=1;i<=numOfPerson;i++)
       if(votes[i] == mx)
           fprintf(out,"%s\n",names[i-1]);
   fclose(out); // closing file
return 0;
}

Sample input (electionVotes.txt):

Victor Taylor
Denise Duncan
Kamal Ramdhan
Michael Ali
Anisa Sawh
Carol Khan
Garry Oliverie
3 1 2 5 4 3 5 3 5 3 2 8 1 6 7 7 3 5 6 9 3 4 7 1 2 4 5 5 1 4 0

Sample output (electionResults.txt):

Invalid vote 8
Invalid vote 9
Number of voters: 30
Number of valid votes: 28
Number of spoilt votes: 2

Candidate Score
Victor Taylor 4
Denise Duncan 3
Kamal Ramdhan 6
Michael Ali 4
Anisa Sawh 6
Carol Khan 2
Garry Oliverie 3

Winner(s):
Kamal Ramdhan
Anisa Sawh

Screenshot of code:

2 3 4 } // header files #include <stdio.h> #include <string.h> #include <stdlib.h> // main function int main() { // opening file to read FILE *fp = fopen("electionVotes.txt","r"); if(fp NULL) { printf("Error while file opening!\n"); exit(); // opening file to write FILE *out = fopen("electionResults.txt","w"); if(out NULL) { printf("Error while file opening!\n"); exit(); 1/ line for reading line by line char *line = (char*)malloc(10000*sizeof(char)); int numof Person = 0; // for number of competitors char names[100][100]; // for storing names // reading line by line while (fgets(line, 10000, fp) != NULL) { if(line[strlen(line) -1] '\n') // remove new line if the line contains it at last line[strlen(line) -1] = '\0'; strcpy(names [numofPerson++], line); // store the names 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 } } fclose(fp); // closing the file numofPerson--; // remove last line which is votes int votes[100] {0}; // for counting number of votes int numofvoters = 0, validvotes = 0; // for counting number of voters char *word; // split last line of input file with respect to white space word = strtok(line, " "); // splitting while word != NULL) {

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 while( word != NULL) { int vote = atoi(word); // converting to int if(vote == 0) // if it is last vote then break break; if(vote > numofPerson) // if vote number is greater than number of competitors then invalid fprintf(out, "Invalid vote %d\n", vote); else { votes [vote]++; // otherwise count the vote validvotes++; // increase valid vote by 1 } numofvoters++; // increase total vote by 1 word = strtok (NULL, " "); // get next vote as string // printing the vote details fprintf(out, "Number of voters: %d\n", numofvoters); fprintf(out, "Number of valid votes: %d\n", validvotes); fprintf(out, "Number of spoilt votes: %d\n\n", numofVoters-validvotes); int mx = -1; // for finding max vote // printing individual votes and calculate max vote fprintf(out, "Candidate Score\n"); for(int i=1;i<=numOfPerson;i++) { fprintf(out,"%s %d\n", names[i-1], votes[i]); if(mx < votes[i]) // update max vote mx = votes[i]; } } // print all names as winners which have max number of votes fprintf(out,"\nWinner(s):\n"); for(int i=1;i<=numofPerson; i++) if(votes[i] == mx) fprintf(out,"%s\n", names[i-1]); fclose(out); // closing file return 0;| }

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