File Reading in C returns empty - c

Question

I'm able to write data into a file but when I read it, it prints an empty file. I tried to make 2 programs one to write to file using permission "w" and one to read using "r" but when I combined both programs and changed permission to "w+" printing the files gives lots of empty spaces.
#include <stdio.h>
#include <stdlib.h>
void main()
{
char name[20];
char roll_no[15];
char class[10];
char semester[10];
char course[20];
FILE *file_pointer;
file_pointer = fopen("StudentRecords.txt", "w+");
if (file_pointer == NULL)
{
printf("\nError Opening File StudentRecords.txt\nCreate File Manually and Try Again.");
exit(1);
}
printf("\nENTER DETAILS FOR 5 STUDENTS\n");
//TAKE 5 RECORDS FROM USERS AND SAVE THEM IN FILE-
for (int i = 1; i <= 5; i++)
{
printf("\nStudent %d", i);
fprintf(file_pointer, "Student %d", i);
printf("\nName : ");
scanf("%s", &name);
fprintf(file_pointer, "\nName : %s", name);
printf("Roll No : ");
scanf("%s", &roll_no);
fprintf(file_pointer, "\nRoll No : %s", roll_no);
printf("Class : ");
scanf("%s", &class);
fprintf(file_pointer, "\nClass : %s", class);
printf("Semester : ");
scanf("%s", &semester);
fprintf(file_pointer, "\nSemester : %s", semester);
printf("Course : ");
scanf("%s", course);
fprintf(file_pointer, "\nCourse : %s", course);
printf("\n");
fprintf(file_pointer, "\n\n");
}
//READ ENTIRE FILE WORD BY WORD
char c;
c = fgetc(file_pointer);
while (c != EOF)
{
printf("%c", c);
c = fgetc(file_pointer);
}
fclose(file_pointer);
}

Answer 1

When you write/read in a file you use a stream (FILE*) that stores where in the file you are (position).
When you finished writting that was the last stream position.
You need to go back to the begin of the file if you want to read it entirely.
You can use fseek for this.
int fseek(FILE *stream, long int offset, int whence);
1 SEEK_SET : Beginning of file
2 SEEK_CUR : Current position of the file pointer
3 SEEK_END : End of file
...
//READ ENTIRE FILE WORD BY WORD
char c;
fseek(file_pointer, 0, SEEK_SET);
c = fgetc(file_pointer);
while (c != EOF)
{
printf("%c", c);
c = fgetc(file_pointer);
}

Answer 2

For the read section do this instead. This will reset the position indicator to the beginning of the file so you can read from the beginning.
if ( fseek(file_pointer, 0L, SEEK_SET) == 0 ) {
char c;
c = fgetc(file_pointer);
while (c != EOF)
{
printf("%c", c);
c = fgetc(file_pointer);
}
}