Cannot read my written file (C Programming Student Database) [closed] - c

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We got an assignment to make a program to read what is written inside our text file (name, student number, course, year, section, etc.. etc..) But I can't seem to make it work, can you tell me what's wrong?
#include <windows.h>
#include <conio.h>
#include <stdio.h>
struct record
{
char name[50],number[50],course[50],gender;
int year, section;
float midterm,final,average,sum;
};
int main()
{
int a=1,n;
int passed=0,failed=0;
FILE *fp;
fp = fopen("BSU.txt","r");
if(fp==NULL)
{
printf("ERROR!");
getch();
}
struct record student[25];
printf("Please input the number of students: ");
scanf("%d", &n);
for(a=0;a<n;a++)
{
fscanf(fp, "%f", student[a].average);// I CANNOT MAKE THE FSCANF WORK!!//
}
getch();
}

Answer 1

It should be
fscanf(fp, "%f", &student[a].average);
instead of
fscanf(fp, "%f", student[a].average);
But this allows you only to read a file containing numbers, for example:
1.5
1.9
2.7
The file you want to read is more compilcated.
So in your for loop you need to read 10 lines, extract the relevant information from each line, store that information in the corresponding field of your record, and store the record somewhere.

Answer 2

You need to consider the input file format.
When you're calling fscanf the 'cursor' is located at the first line of your file. What you need to to is to bring the cursor to the line you want to read.
Student Name: Andrea Zoelle Jacinto <-- cursor is located at the beginning of this line
Gender: M
Student Number: 2015-04711-MN-0
Course: BSIT
Year: 1
Section: 2
Midterm Grade: 2.00
Final Grade: 1.75
Average Grade: 1.8 <-- you need the cursor here
To achieve that you can use fgets in an while loop to get rid of the lines before the desired line.
char line[256];
while( fgets(line, 256, fp) && line[0] != 'A'); // line[0] != 'A' makes the loop stop when it reached the desired line
Now your cursor is at the desired line, however you need to get rid of the text in front of the value you want to read.
Average Grade: 1.8 <-- get rid of "Average Grade: "
The good thing is line already contains this line, so you can use sscanf to read formatted from this string.
sscanf(line, "%*s %*s %f", &student[0].average); // note the ampersand in front of student[0].average to get its address
Using %*s makes sscanf ignore the words "Average" and "Grades:" so %f will read the desired value.

Answer 3

Because it looks like your homework, I will not give you the solution but I tell you where is bug.
You are using fscanf in the incorrect way. This line:
fscanf(fp, "%f", &student[a].average);
is telling something like: "take somevalue (float type) and write it to student[a].average".
It can't work in your situation, because your data structure is more compilacted.
What have you to do?
First, try to write all data from the file on output.
After that, you should try to parse the line which are you interest :)
Read about getline, sscanf. It could be very helpful for you :)