/**********************************************************************
cs1713p0.c by your name
Purpose:
This program computes the average grade for each student.
Command Parameters:
n/a
Input:
The standard input file stream contains multiple lines (terminated by EOF).
Each line contains:
dExam1 dExam2 dFinalExam szSudentNr szName
10.2lf 10.2lf 10.2lf
6s
20s (but the name may have blanks)
Results:
Prints the student Id, name, exam scores, and average for each student.
Returns:
0 - normal
2 - bad input data, not enough good data values on a line
Notes:
When bad data is encountered, the program terminates.
**********************************************************************/
// If compiling using visual studio, tell the compiler not to give its warnings
// about the safety of scanf and printf
#define _CRT_SECURE_NO_WARNINGS 1
/*
Include Files */
#include <stdio.h>
#include "cs1713p0.h"
int main(int argc, char *argv[])
{
Student student;
FILE *pfileStudent;
char szInputBuffer[MAX_LINE_SIZE + 1];
int iScanfCnt;
inputs
double dAverage;
//
//
//
//
student structure for holding student data
FILE variable for student file
input buffer for fgets
scanf returns the number of successful
// grade average for a student
pfileStudent = stdin;
// Print a heading
printf("%-10s %-20s %10s %10s %10s %10s\n"
, "ID", "Name", "Exam 1", "Exam 2", "Final", "Average");
// read data input lines of text until EOF. fgets returns NULL at EOF
while (fgets(szInputBuffer, MAX_LINE_SIZE, pfileStudent) != NULL)
{
// if the line is just a line feed, skip it.
if (szInputBuffer[0] == '\n')
continue;
iScanfCnt = sscanf(szInputBuffer, "%lf %lf %lf %6s %20[^\n]\n"
, &student.dExam1
, &student.dExam2
, &student.dFinalExam
, student.szStudentIdNr
, student.szStudentFullNm);
// Check for bad input. scanf returns the number of valid conversions
if (iScanfCnt < 5)
{
printf("invalid input when reading student data, only %d valid values. \n"
, iScanfCnt);
printf("\tdata is %s\n", szInputBuffer);
return ERR_BAD_INPUT;
}
dAverage = (student.dExam1 + student.dExam2 + student.dFinalExam) / 3;
printf("%-10s %-20s %10.2f %10.2f %10.2f %10.2f\n"
, student.szStudentIdNr
, student.szStudentFullNm
, student.dExam1
, student.dExam2
, student.dFinalExam
, dAverage);
}
fclose(pfileStudent);
return 0;
}