Program is not reading some characters from first line of text file - c

Question

So my program basically asks for the assignment name/student name after clicking "1" from the student menu to submit an assignment. The function reads an arbitrary assignment from a text file I have in my debug folder, called "myassignment.txt". Then it creates a new file called "submission.txt" with the assignment name, student name and the assignment in it.
When I click "2" from the student menu to see the submitted assignment, it prints the assignment name and student name fine, but skips the first few characters from the first line of the actual assignment.
It skips more or less characters depending on how long the assignment name and student name are.
I can't figure out why it's doing this.
Here is my code for the data structure, menu, and functions used in the first two options of the menu:
#include "assignmentgrading3.h"
#define MAX_STUDENT_NAME_SIZE 50
#define MAX_ASSIGNMENT_NAME_SIZE 50
#define MAX_ASSIGNMENT_SIZE 1000
typedef struct{
char assignmentName[MAX_ASSIGNMENT_NAME_SIZE];
char studentName[MAX_STUDENT_NAME_SIZE];
char assignment[MAX_ASSIGNMENT_SIZE];
double score;
} Assignment;
void studentMenu(Assignment* assignmentStruct) {
int choice;
do {
printf("\nStudent Menu:\n");
printf("1. Submit an assignment\n");
printf("2. See the submitted assignment\n");
printf("3. See the graded assignment\n");
printf("4. Exit\n");
printf("Please enter a number from 1 - 4: ");
scanf("%d", &choice);
switch (choice) {
case 1:
submitAssignment(assignmentStruct, "myassignment.txt");
break;
case 2:
getAssignment(assignmentStruct);
displayAssignment(assignmentStruct);
break;
case 3:
getGradedAssignment(assignmentStruct);
displayGradedAssignment(assignmentStruct);
break;
case 4:
exit(0);
break;
}
} while (choice != 5);
}
void readRemainingLines(FILE* pFile, char* assignment){
long charsRead = 0;
while(fgets(assignment + charsRead, MAX_ASSIGNMENT_SIZE - charsRead, pFile)!= NULL)
{
charsRead = strlen(assignment);
if(charsRead >= MAX_ASSIGNMENT_SIZE - 1) //Credits: Carl Gelfand
break;
}
assignment[MAX_ASSIGNMENT_SIZE-1] = 0; //Just to make sure.
}
//Reads the file whose name is provided as string “fileName”,
//and creates a file named “submission.txt” as specified in the functional specification.
//It returns a 1 when it is successful, otherwise it returns a 0.
int submitAssignment(Assignment* assignmentStruct, char* fileName) {
FILE* pFile =0;
//char assignment[MAX_ASSIGNMENT_SIZE];
char* submissionFileName="submission.txt";
//Reading information from a user provided file : fileName
pFile = fopen(fileName,"r");
if(pFile==NULL){
printf("%s file did not open\n,",fileName);
exit(0);
}//EO if(pFile==NULL)
printf("Please enter the name of the assignment: ");
scanf(" %s", assignmentStruct->assignmentName);
printf("Please enter your (student) name: ");
scanf(" %s", assignmentStruct->studentName);
readRemainingLines(pFile, assignmentStruct->assignment);
fclose(pFile);
// Writing Information to "submission.txt"
pFile = fopen(submissionFileName, "w");
if(pFile == NULL) {
printf("%s file did not open\n,", submissionFileName);
exit(0);
} //EO if(pFile==NULL)
fprintf(pFile, "%s\n", assignmentStruct->assignmentName);
fprintf(pFile, "%s\n", assignmentStruct->studentName);
fprintf(pFile, "%s\n", assignmentStruct->assignment);
fclose(pFile);
return 1;
}
int getAssignment(Assignment* assignmentStruct) {
FILE* pFile = 0;
pFile = fopen("submission.txt","r");
if(pFile==NULL){
printf("file did not open\n,");
exit(0);
}
fscanf(pFile, "%[^\n]", assignmentStruct->assignmentName);
fscanf(pFile, "%[^\n]", assignmentStruct->studentName);
readRemainingLines(pFile, assignmentStruct->assignment);
return 1;
}
void displayAssignment(Assignment* assignmentStruct) {
char* middleOfAssignment = &(assignmentStruct->assignment[strlen(assignmentStruct->assignmentName) + strlen(assignmentStruct->studentName) + 2]);
print(assignmentStruct->assignmentName, assignmentStruct->studentName);
printf("%s \n", middleOfAssignment);
//printf("%s \n", assignment);
}
void print(char* assignmentName, char* studentName) {
printf("Assignment Name: %s \nStudent: %s\n", assignmentName, studentName);
}

Answer 1

displayAssignment is skipping over the first few characters of the assignment when it assigns middleOfAssignment. It's skipping the first strlen(assignmentStruct->assignmentName) + strlen(assignmentStruct->studentName) + 2 characters.
It should just print assignmentStruct->assignment, there's no need for middleOfAssignment. The only reason for that code would be if assignment contained a copy of the assignment name and student name at the beginning, but it doesn't.
void displayAssignment(Assignment* assignmentStruct) {
print(assignmentStruct->assignmentName, assignmentStruct->studentName);
printf("%s \n", assignmentStruct->assignment);
}