fscanf printf while loop help

I made this program and got it to compile without any errors but it doesn't run as expected. If I enter 2 I will get to see all of the student information for each individual. Once I get back to the menu selection and press 2 again I don't see any student information. How can I make it so that every time I press 2 at the menu I get to see all student information?

Code:

 #include <stdio.h>
#include <string.h>

int main()

{
	FILE *pAppend;
	FILE *pRead;
	char fName[21];
	char lName[21];
	char id[15];
	float gpa=0;
	int iSelection=0;

	pAppend = fopen("StudentInformation.dat", "a");
	pRead = fopen("StudentInformation.dat", "r");

	
	
	while(iSelection!=3) {
	printf("\nStudent Information Exercise\n\n");
	printf("Select an option\n");
	printf("1)\tEnter student information\n");
	printf("2)\tView current student information on file\n");
	printf("3)\tExit student information exercise\n\n");

	scanf("%d", &iSelection);
	
	if (pAppend==NULL)
		printf("File not opened\n");
	
	if(iSelection==1){
	if (pAppend==NULL){
		printf("File not opened\n");
		return 0;	
			}

		printf("Enter first name, last name id and GPA\n\n");
		printf("Enter data seperated by spaces:  ");
		scanf("%s%s%s%f", fName, lName, id, &gpa);
		fprintf(pAppend, "%s\t%s\t%s\t%.2f\n", fName, lName, id, gpa);
		fclose(pAppend);
		}
	if(iSelection==2) {
		if (pRead==NULL){
		printf("File not opened\n");
		return 0;	
			}

		printf("Current student information\n\n");
		printf("First Name\tLast Name\tID\tGPA\n");
		fscanf(pRead, "%s%s%s%f", fName, lName, id, &gpa);
		while(!feof(pRead) ) {
		printf("%s\t\t%s\t\t%s\t%.2f\n", fName, lName, id, gpa);
		fscanf(pRead, "%s%s%s%f", fName, lName, id, &gpa);
				}
		fclose(pRead);
	}


}

}

Opening the same file for reading and updating won't work.

You've already opened it for update, that is all you need.

However, having said that, performing updates on a text file is exceedingly difficult with variable length records.
It is generally a LOT simpler to read from one file, and write to another.

Also, your indentation still needs work.
SourceForge.net: Indentation - cpwiki

Thanks.

Link isn't working, I'll check it again later and look at my books indentation till then.