A multiple-choice quiz has a total of 15 questions. Each question can either be:

Question

A multiple-choice quiz has a total of 15 questions. Each question can either be: A, B, C, D, E (five choices). All data for the quiz is stored in a file quiz.txt.

The first line of data contains the correct answers to the 15 questions in the first 15 consecutive character positions

For Example: ABBCBBEDCEDBCCA

Each line in the file contains the answers for an individual student. Data on a line consists of a student ID (integer), then by a space, followed by the 15 answers given by the student in the next 15 consecutive character positions. An X is used if the student did not answer one of the questions.

For example: 1225 ADBCXCXECAXABCA

There is no limit to how many students there are. A line containing a “studentID” 0 indicates the end of the data.

A student’s overall total score is calculated by adding up points.

Points for a question are calculated as shown: Correct answer = 5 points, wrong answer = -2 points, no answer = 0 points

.

Write a C program that prints:

1. Each student ID and there overall total score

2. The total number of students

3. The number of correct responses to each of the 15 questions individually(example:

Question Number: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Number correct: 5 8 2 9 8 5 3 2 8 4 9 4 6 7 9

Hint: For loop's and three array's must be used. Basic/Simple program for beginners.

Use appropriate variable names (example: int correct=0, wrong=0, noattempted=0, char answers[16], char studentanswers[16], char correctnumberanswers[15], etc.)

.

Sample data in quiz.txt

ABEDEEBCEABBCCA

4564 ABEXXBXECDDCBAA

2216 ABEDEEBXXEDEACA

8532 BBEEEBXECDDCBAA

5829 ABEEABEECDDCBAA

7721 CBEXBBXECDDCBXX

0

Explanation / Answer

#include<iostream>

#include<stdlib.h>

#include<string>

using namespace std;

int main() {

FILE *fp=fopen("quiz.txt","r");

if(fp==NULL) {

cout<<"Wrong filename";

return 0;

}

int f=0, id, cnt=0;

char ans[20], std_ans[20];

int *std_id, *correct, *wrong, *unattempt;

while(true) {

if(f==0) {

f=1;

fscanf(fp,"%s",ans);

if(strcmp(ans,"0")==0) break;

} else {

fscanf(fp,"%d %s",&id,std_ans);

if(id==0) break;

cnt++;

}

}

int std_points[cnt], qc[16]={0};

if(cnt>0) {

std_id=(int*)malloc(sizeof(int)*cnt);

correct=(int*)malloc(sizeof(int)*cnt);

wrong=(int*)malloc(sizeof(int)*cnt);

unattempt=(int*)malloc(sizeof(int)*cnt);

fp=fopen("quiz.txt","r");

f=0; cnt=0;

while(true) {

if(f==0) {

f=1;

fscanf(fp,"%s",ans);

if(strcmp(ans,"0")==0) break;

} else {

fscanf(fp,"%d %s",&id,std_ans);

if(id==0) break;

std_id[cnt]=id;

int t=0, corr_count=0, wrong_count=0, unattemp_count=0;

for(int i=0;i<15;++i) {

if(std_ans[i]=='X') unattemp_count++;

else if(std_ans[i]==ans[i]) t+=5, corr_count++, qc[i]+=1;

else t-=2, wrong_count++;

}

std_points[cnt]=t;

correct[cnt]=corr_count;

wrong[cnt]=wrong_count;

unattempt[cnt]=unattemp_count;

cnt++;

}

}

for(int i=0;i<cnt;++i) {

printf("Student id and marks obtained in exam %d --> %d ", std_id[i],std_points[i]);

}

printf("Total students appeared for exam %d ",cnt);

printf("Question number:");

for(int i=0;i<15;++i) {

printf(" %d",(i+1));

}

printf(" ");

printf("Number correct:");

for(int i=0;i<15;++i) {

printf(" %d",qc[i]);

}

printf(" ");

}

}

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