C++ Error running code... Using: Visual Studio Express 2015 for Windows Desktop
ID: 3868242 • Letter: C
Question
C++ Error running code...
Using: Visual Studio Express 2015 for Windows Desktop
It seems to be at this line of the code --> cashier1 = *curr; (line 297 for me)
Code
#include "stdafx.h"
#include <iostream>
#include <queue>
#include <list>
#include <fstream>
#include <stdlib.h>
#include <string>
using namespace std;
//customer class to hold information pulled from notepad
class Customer
{
//all information on the customer pulled from notepad
int number;
int arrival_time;
int serv_time;
public:
Customer()
{
number = 0;
arrival_time = 0;
serv_time = 0;
}
void set_number(int x)
{
number = x;
}
void set_arrival_time(int x)
{
arrival_time = x;
}
int get_arrival_time()
{
return arrival_time;
}
void set_serv_time(int x)
{
serv_time = x;
}
int get_serv_time()
{
return serv_time;
}
};
//Cashier class to act as 5 queues for customer info to be held in
class Cashier
{
int timer; //minutes in use
char status; // 'a' -available, 'i' - inactive
queue<int> time_limit; //depends on customer serv_time
int in_line;
public:
Cashier()
{
timer = 0;
status = 'a';
in_line = 0;
}
char get_status()
{
return status;
}
void inc_timer()
{
timer++;
}
int get_timer()
{
return timer;
}
int get_in_line()
{
return in_line;
}
void add_customer(int serv_time)
{
//sets timer to 0 for first input, since i reset it on pop its
//needed for first entry.
if (time_limit.empty())
{
timer = 0;
}
//puts the serv_time on the queue of time_limits
time_limit.push(serv_time);
//add customer to line
in_line++;
if (in_line == 6)
{
status = 'i';
}
}
int get_curr_cust_time_limit()
{
return time_limit.front();
}
void rmv_frnt_cust()
{
time_limit.pop();
timer = 0;
in_line--;
status = 'a';
}
};
//Sim_data_type class to hold overall simulation data
class Sim_data_type
{
int time_cnt; // ranges in values from 0 to 600
int num_serviced; // number of customers serviced so far
long tot_wait_time; // of all customers in the queues
int num_turned_away; // count of customers turned away
public:
Sim_data_type()
{
time_cnt = 0;
num_serviced = 0;
tot_wait_time = 0;
num_turned_away = 0;
}
void inc_cnt()
{
time_cnt++;
}
int get_cnt()
{
return time_cnt;
}
void inc_num_turned_away()
{
num_turned_away++;
}
int get_num_turned_away()
{
return num_turned_away;
}
void inc_num_serviced()
{
num_serviced++;
}
int get_num_serviced()
{
return num_serviced;
}
int get_avg_wait_time()
{
return tot_wait_time / num_serviced;
}
void add_tot_wait_time(int x)
{
tot_wait_time = tot_wait_time + x;
}
};
#include <iostream>
#include <queue>
#include <list>
#include <fstream>
#include <stdlib.h>
using namespace std;
int main(void)
{
//setting up the 5 lines of cashiers
Cashier cashier1;
Cashier cashier2;
Cashier cashier3;
list<Cashier> lines;
list<Cashier>::iterator curr = lines.begin();
list<Cashier>::iterator next = lines.begin();
for (int i = 0; i < 5; i++)
{
lines.push_back(cashier1);
}
//creating Customer variable to temporarily hold input
Customer cust;
//creating queue to hold input from file
queue<Customer> custInput;
//creating variable to hold simulation data
Sim_data_type sim;
//file for getting input
ifstream in_file;
//used to temperarily hold the line obtained from the file
string line;
//used to temperarily hold the selected substring
string substring;
//opening file
in_file.open("output.txt");
if (in_file.fail())
{
cout << "Could not open file. ";
return 0;
}
else
{
//get data from file until end of file
while (!in_file.eof())
{
//gets input until new line
getline(in_file, line);
//if extracted string isn't empty
if (line.length() > 0)
{
//getting the first digits for (number)
substring = line.substr(0, 2);
cust.set_number(atoi(substring.c_str()));
//getting the next digits for (arrival_time)
substring = line.substr(4, 4);
cust.set_arrival_time(atoi(substring.c_str()));
//getting the next digits for (serv_time)
substring = line.substr(9, 3);
cust.set_serv_time(atoi(substring.c_str()));
//adding newly created customer to the data queue
custInput.push(cust);
}
}
//closing file
in_file.close();
}
//while store not closed
while (sim.get_cnt() < 600)
{
//increment minutes
sim.inc_cnt();
for (int i = 0; i < 5; i++)
{
cashier1 = *curr;
curr++;
cashier1.inc_timer();
*curr = cashier1;
}
//move cashiers to proper positions
curr = lines.end();
next = lines.end();
next--;
while (curr != lines.begin())
{
curr--;
next--;
cashier1 = *curr;
cashier2 = *next;
if (cashier1.get_in_line() < cashier2.get_in_line())
{
//swap placements so cashier with the smallest line is in
//front
cashier3 = cashier2;
cashier2 = cashier1;
cashier1 = cashier3;
}
}
//while customers can still be served
if (sim.get_cnt() < 570)
{
//set cust to temporarily hold front of custInput
cust = custInput.front();
//put customer in smallest line
curr = lines.begin();
cashier1 = *curr;
//if the front of queue is ready to join line
while (cust.get_arrival_time() == sim.get_cnt())
{
//flag to see if more than one customer has arrived at the
//same time
int flag = 0;
//if another round move to next line
if (flag > 0)
{
curr++;
cashier1 = *curr;
}
//set the customer to the first available/shortest
//lane; if none are open turn them away
if (cashier1.get_status() == 'a')
{
//adding customers serv time to cashiers queue
cashier1.add_customer(cust.get_serv_time());
//removing customer from input we added to queue
custInput.pop();
//setting cust to new front so while checks correctly
cust = custInput.front();
}
else
{
sim.inc_num_turned_away();
}
flag++;
}
}
//increment sim variables for output later
//if cashiers timer = the serv time of cust
//then remove that cust
curr = lines.begin();
cashier1 = *curr;
for (int i = 0; i < 5; i++)
{
if (cashier1.get_timer() == cashier1.get_curr_cust_time_limit())
{
//add the customer-to-be-removed's wait time to total wait
sim.add_tot_wait_time(cashier1.get_curr_cust_time_limit());
//remove it front queue
cashier1.rmv_frnt_cust();
//increment the total number serviced
sim.inc_num_serviced();
}
curr++;
cashier1 = *curr;
}
}
//final output
cout << "Total number of customers serviced: " << sim.get_num_serviced();
cout << endl << "Total number of customers turned away: "
<< sim.get_num_turned_away();
cout << endl << "Average wait time: " << sim.get_avg_wait_time() << endl;
//exit program
return 0;
}
output.txt file data.
1 10 2
2 14 7
3 29 7
4 46 3
5 53 5
6 55 7
7 67 6
8 70 6
9 79 3
10 93 1
11 104 2
12 108 4
13 124 1
14 143 3
15 161 3
16 170 1
17 174 7
18 183 3
19 198 6
20 199 4
21 207 1
22 211 3
23 223 4
24 231 2
25 231 5
26 245 7
27 259 6
28 275 1
29 289 1
30 293 5
Explanation / Answer
The error you getting is debug assertion error.
For that you just need to copy the file whichever you are using for input(which are notepad .txt files) or the related files which are used to do computation and paste it into the main folder of Visual studio project folder where your source code is present. Hope it works!
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