Dfyjkt

#include <iostream>
#include <cstring>
#include <cstdio>
#include <iomanip>
#include <conio.h>
#include <cstdlib>



using namespace std;
int main() 

 FILE *fp;
 char moreRecords, addRecord;

 struct student 

 char firstName[100], lastName[100];
 int courseNumber, sectionNumber;

 ;

 struct student s;
 char newLastName[100];
 long int dbsize;
 errno_t g;

 g = fopen_s(&fp,"studentdb.txt", "r+");

 if (g == NULL)
 g = fopen_s(&fp,"studentdb.txt", "r+");

 if (g == NULL) 
 puts("Can't open selected file");
 return 0;
 
 

 dbsize = sizeof(s);

 while (1) 
 system("cls");

 cout << "1. Add Records" << endl; //Lets the user add their records
 cout << "2. List Records" << endl; //Lets the user List all the previous records
 cout << "3. Modify Records" << endl; //Lets the user modify previously entered records
 cout << "4. Delete Records" << endl; //Lets the user delete preciously entered records
 cout << "5. Exit Program" << endl; //Exits the program
 cout << "Please make a selection above:n";
 //fflush(stdin);
 addRecord = _getche();
 switch (addRecord)
 
 case '1' :
 fseek(fp, 0, SEEK_END);
 moreRecords = 'Y';
 while (moreRecords == 'Y' 

 

 system("pause");
 return 0;

So when I go through the initial options, it works for 3. Modify Records and 4. Delete Records. When you enter 1,2 or 5 it immediately breaks and gives me a Debug Assertion Failed error. It says
File: minkernelcrtsucrtsrcappcrtstdiofseek.cpp
Line: 177
Expression: stream.valid()
Tried debugging the code but wasn't able to find anything giving that error. Any help would be greatly appreciated.