Question

Project Exam Statistics A CIS 22A class has two midterm exams with a score between 0 and 100 each. Fractional scores, such as 88.3 are not allowed. The students' ids and midterm exam scores are stored in a text file as shown below // id exam1 exam2 DH232 89 92 Write a program that reads data from an input file named exams.txt, calculates the average of the two midterm exams scores for each student and the class average for each midterm exam, and writes a report to an output file named results.txt. When you calculate the class average for each exam do not take 0 into account Input: Create a new text file and name it exams.txt, then copy and paste the following data into this file. Assume that the input file has an unknown number of lines DH232 89 92 DR123 100 95 AJ222 98 85 SW111 0 0 12AB1 82 91 516BC 99 92 2ABCD 100 88 333XY 9275 TY4XZ 43 0 AC234 78 93 9QWE9 45 O JP200 89 98 AK323 100 91

have to create five different functions above and call it in the main fucntion.

Answer 1

//since you are not mentioned if it's c/c++ , doing it in C , so that it can be run in c++ too

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define SIZE 10
void printInfo();
int getStuData(char ids[][10], int scores[][2]);
float *calcAvg(char ids[][10], int n);
void writeStuData(char ids[][10], int scores[][2], int n);
void printEnd();

int main()
{
   int n;
   int ids[SIZE], scores[SIZE][2];
   //function calls
   printInfo();
   n = getStuData(ids, scores);
   writeStuData(ids, scores,n);
   printEnd();
}
void printInfo()
{
   printf("####Welcome #####\n");
   printf("Name: Your Name\n");
   printf("Input file: studentIn.txt\n");
   printf("Output: studentOut.txt\n");
   printf("Description: \n*This program reads the student id and two scores from input file.\n*It then calculates average for each student and as well class average and writes to output file.\n");
}
int getStuData(char ids[][10], int scores[][2])
{
   FILE *fp;
   int count = 0, score1, score2;
   char id[10];

   fp = fopen("studentIn.txt", "r");
   if (fp == NULL)
   {
       printf("Not able to open file studentIn.txt for reading\n");
       return -1;
   }
   while (!feof(fp))
   {
       fscanf(fp, "%s%d%d", &id, &score1, &score2);
       strcpy(ids[count] ,id);
       scores[count][0] = score1;
       scores[count][1] = score2;
       ++count;
   }
   return count;
}
float *calcAvg(int scores[][2], int n)
{
   float *avg=(float*)malloc(n*sizeof(float));
   float sum = 0;
   int i,j;
   for (i = 0; i < n; i++)
   {
       avg[i] = 0;
   }
   for (i = 0; i < n; i++)
   {
       for (j = 0; j < 2; j++)
       {
           sum+= scores[i][j];
       }
       avg[i] = sum / 2;
       sum = 0;
   }
   return avg;
}
void writeStuData(char ids[][10], int scores[][2], int n)
{
   int i;
   FILE *fp;

   float *avg = calcAvg(scores, n);
   //open file for writing
   fp = fopen("studentOut.txt", "w");
   if (fp == NULL)
   {
       printf("Not able to open file studentOut.txt for writing\n");
       return;
   }
   fprintf(fp, "=============================\n");
   fprintf(fp, " CSA 22A\nMidterm Exams Statistics\n=============================\n");
   fprintf(fp, " ID\tExam1\tExam2\tAverage\n");

   for (i = 0; i < n; i++)
   {
       fprintf(fp, "%5s\t%3d\t%3d\t%.1f\n", ids[i], scores[i][0], scores[i][1], avg[i]);
   }
   fprintf(fp, "=============================\n");
   fprintf(fp, "Number of students: %d ",n);
   fclose(fp);
}
void printEnd()
{
   printf("\nExit Message: Bye bye...\n");
}

===========================

//Output screenshot given along with studentIn.txt and studentOut.txt(input and output file respectively)