أرجو المساعدة في ايجاد الخطأ في هذا الكود ..

#include<iostream>

using namespace std;

struct pass //structure of passenger

{

int ID; //passenger number

int src; //source floor

int dst; //destination floor

int time; //the time of request

int wtime; //waiting time

pass *next;

};

void printAll(pass *head);

void prepend(int ID,int time,int src,int dst, pass *&head);

int main()

{

ifstream inp("test.txt");

int i,n,x;

i=1;

inp>>x;

while (x != -1)

{

inp >>x;

i++;

}

n= (i)/4;

return n;

int j=0;

while (j <= n)

{

int d,y,z,w;

inp>>x>>y>>z>>w;

pass *listpass = NULL;

prepend(d,y,z,w,listpass);

printAll(listpass);

cout << endl << endl;

j++;

}

}

void prepend(int ID,int time,int src,int dst, pass *&head)

{

pass *newp = new pass;

newp->ID = ID;

newp->time = time;

newp->src = src;

newp->dst = dst;

newp->next = head;

head = newp;

}

void printAll(pass *head)

{

pass *N = head;

while(N != NULL)

{

cout << "[ " << N->ID << " ]"<< "[ " << N->time << " ]"<< "[ " << N->src << " ]"<< "[ " << N->dst << " ]";

cout << "--->"<< endl;

N = N->next;

}

cout << "*";

}