I'm trying to create a simulation for a service line at a super market. The program builds just fine, but when I run it, I get:
"Debug Assertion Failed!
Program:...
File:c:\program files\microsoft visual studio 8\vc\include\deque
Line: 97
Expression: deque iterator not dereferencable"
#include "stdafx.h"
#include <iostream>
#include <queue>
#include <cstdlib>
#include <ctime>
using namespace std;
//for readability later
#define RANDFOUR (rand()%4+1)
int main()
{
//seeding for random variables
srand(time(0));
//Queue declarations, didn't paste irrelevant stuff
queue<int> ServiceQueue;
//variable declarations, didn't paste irrelevant stuff
int TimeCount=0;//counter for how many minutes have elapsed
int NextArrival=RANDFOUR;//assigns 1-4 min for arrival of costumer
while (TimeCount<720)
{
//if it's time for the next costumer to arrive.
if (TimeCount==NextArrival)
{
}
//if service is over for the current costumer
if (ServiceQueue.front()==0)
{
}
else//if service is not yet over for the current costumer
{
}
++TimeCount;
}
//irrelevant stuff
//output
return 0;
}By debuging using cout statements, I figured that the program works fine until just before:
if(TimeCount==NextArrival)
but I'm not sure why. =( Can someone help?