***** C Programming only ***** Write a complete program, using C, to get data fr

Question

***** C Programming only *****

Write a complete program, using C, to get data from file name DATA.TXT one line at a time until there is no more data in that file. The following is one sample line in DATA.TXT ( have as many record as you wish in DATA.TXT)

Name     SSN                     quiz       mid       assignments      participation      final

LISA       111-11-1111      100        100        100                      100                      100

Jack       222-22-2222      80          80          100                      90                        100

Note that the first line is no in DATA.txt.

Your program should create a file name RESULT.txt that reports Name, SSN and a letter grade according to the following rules:

Total= 15% quiz + 15 %mid +40% assignments + 10% Participation+ 20%final

If total >= 90 then A else if total>=80 then B….

You can print same output to screen as well as RESULT.txt.

Explanation / Answer

// C code

#include <stdbool.h>      
#include <stdio.h>
#include <stdlib.h>

// determine grade
char letterGrade(double total)
{
   char grade;
   if(total >= 90)
    grade = 'A';
   else if(total >= 80)
    grade = 'B';
   else if(total >= 70)
    grade = 'C';
   else if(total >= 60)
    grade = 'D';
   else
    grade = 'F';

   return grade;

}

int main()
{
    char name[20];
    char ssn[20];
    double quiz,mid,assignmets,participation,final;
    double total;
    char grade;
    FILE *inputFile;
    FILE *outputFile;

    // open input file
    if ((inputFile = fopen("DATA.txt", "r")) == NULL)
    {
        // Program exits if file pointer returns NULL.
        printf("Error! opening file");
        exit(1);       
    }

    // open output file
     outputFile = fopen("RESULT.txt", "w");
     if(outputFile == NULL)
     {
        printf("Error!");
        exit(1);
     }

    fprintf(outputFile, "Name SSN Grade ");
    while(1)
    {
      fscanf(inputFile,"%s", name);
      fscanf(inputFile,"%s", ssn);
      fscanf(inputFile,"%lf", &quiz);
      fscanf(inputFile,"%lf", &mid);
      fscanf(inputFile,"%lf", &assignmets);
      fscanf(inputFile,"%lf", &participation);
      fscanf(inputFile,"%lf", &final);

      // determien total and grade
      total = 0.15*quiz + 0.15*mid + 0.4*assignmets + 0.1*participation + 0.2*final;
      grade = letterGrade(total);

      // output to file
      fprintf(outputFile,"%s ", name);
      fprintf(outputFile,"%s ",ssn);
      fprintf(outputFile,"%c ", grade);

      // break when end of file is reached
      if (feof(inputFile))
          break;
    }
  
    // close both filess
    fclose(inputFile);
    fclose(outputFile);

    return 0;
}

/*

DATA.txt
Lisa 111-11-1111 100 100   100 100 100
Jack 222-22-2222 80 80 100 90 100
Jason 333-33-3333 45 78 100 90 100
Alex 444-44-4444 80 80 67 90 100
Mike 555-55-5555 80 23 44 90 100
Danny 666-66-6666 23 23 44 90 44

RESULT.txt
Name SSN     Grade
Lisa 111-11-1111   A
Jack 222-22-2222   A
Jason 333-33-3333   B
Alex 444-44-4444   C
Mike 555-55-5555   D
Danny 666-66-6666   F

*/

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