C++

Forum

 
feel like im in a catch22 situation

kerreck (12)
so my assignment is to load a file of US national parks into an array, search for the largest, smallest, oldest, newest. then write the entire array to a new file but also write
the oldest is: ...
the newest is: ...
etc.
now i have all of that pretty much done, but based on the confines of the assignment i cant for the life of me figure out how to specifically output the special parks.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
 
 //***************************************************************************
//
//		File:			Parks_Driver.cpp
//		
//		Student:		
//
//		Assignment:	 	Program  #7		
//
//		Course Name:	Programming II 
//
//		Course Number:	
//
//		Due:			
//
//
//		This is the driver (main) function program
//		 
//
//		Other files required: 
//			1.	Parks.h			  –  header file
//			2.	Parks.cpp		  –  prototypes of Parks.h 
//		
//**************************************************************************

#include <iostream>
#include <string>
#include <fstream>
#include "Parks.h"
using namespace std;
//********************************************************
void loadParks(Parks us_parks[], const int SIZE);
void outputParks(Parks us_parks[], const int SIZE);
int findOldest(Parks us_parks[], const int SIZE);
int findNewest(Parks us_parks[], const int SIZE);
int findLargest(Parks us_parks[], const int SIZE);
int findSmallest(Parks us_parks[], const int SIZE);
//********************************************************
int main()
{
	const int SIZE = 59;
	Parks us_parks[SIZE];
	loadParks(us_parks, SIZE);
	findOldest(us_parks, SIZE);
	findNewest(us_parks, SIZE);
	findLargest(us_parks, SIZE);
	findSmallest(us_parks, SIZE);
	outputParks(us_parks, SIZE);
	cout << "worked" << endl;
	return 0;
}
//********************************************************
void loadParks(Parks us_parks[], const int SIZE)
{
	string temp_str[59];
	int temp_int[59];
	double temp_dbl[59];
	fstream inFile;
	inFile.open("park_data.txt", ios::in);
	for (int i = 0; i < SIZE; i++)
	{
		getline(inFile, temp_str[i]);
		us_parks[i].setNAME(temp_str[i]);
		getline(inFile, temp_str[i]);
		us_parks[i].setLocation(temp_str[i]);
		getline(inFile, temp_str[i]);
		us_parks[i].setMonth(temp_str[i]);
		inFile >> temp_int[i];
		us_parks[i].setDay(temp_int[i]);
		inFile >> temp_int[i];
		us_parks[i].setYear(temp_int[i]);
		inFile >> temp_dbl[i];
		us_parks[i].setArea(temp_dbl[i]);
		inFile.ignore();
	}
	inFile.close();
}
//********************************************************
void outputParks(Parks us_parks[], const int SIZE)
{
	fstream outFile;
	outFile.open("a7.txt", ios::out);
	for (int i = 0; i < SIZE; i++)
	{
		us_parks[i].Print_Parks(outFile);
	}
	outFile.close();
}
int findOldest(Parks us_parks[], const int SIZE)
{
	int loc = 0;
	for (int i = 0; i < SIZE; i++)
	{
		if (us_parks[i].getYear() < us_parks[loc].getYear())
			loc = i;
	}
	return loc;
}
int findNewest(Parks us_parks[], const int SIZE)
{
	int loc = 0;
	for (int i = 0; i < SIZE; i++)
	{
		if (us_parks[i].getYear() > us_parks[loc].getYear())
			loc = i;
	}
	return loc;
}
int findLargest(Parks us_parks[], const int SIZE)
{
	int loc = 0;
	for (int i = 0; i < SIZE; i++)
	{
		if (us_parks[i].getArea() > us_parks[loc].getArea())
			loc = i;
	}
	return loc;
}
int findSmallest(Parks us_parks[], const int SIZE)
{
	int loc = 0;
	for (int i = 0; i < SIZE; i++)
	{
		if (us_parks[i].getArea() < us_parks[loc].getArea())
			loc = i;
	}
	return loc;
}
 
prototype file

//***************************************************************************
//
//		File:			Parks.cpp
//		
//		Student:		
//
//		Assignment:	 	Program  #7		
//
//		Course Name:	Programming II 
//
//		Course Number:	
//
//		Due:			
//
//
//		This is the prototype file
//		 
//
//		Other files required: 
//			1.	Parks.h			  –  Header file
//			2.	Parks_Driver.cpp  –  Driver File 
//		
//**************************************************************************

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include "Parks.h"
using namespace std;
//********************************************************
Parks::Parks()
{
	name = "";
	location = "";
	month = "";
	day = 0;
	year = 0;
	area = 0;
}
//********************************************************
Parks::~Parks()
{
	name = "";
	location = "";
	month = "";
	day = 0;
	year = 0;
	area = 0;
}
//********************************************************
Parks::Parks(const Parks &p)
{
	name = p.name;
	location = p.location;
	month = p.month;
	day = p.day;
	year = p.year;
	area = p.area;
}
//********************************************************
void Parks::Print_Parks(fstream &outFile)
{
	outFile << "Name: " << name << endl
		<< "Location: " << location << endl
		<< "Established: " << month << " " << day
		<< ", " << year << endl << "Area: " << 
		setprecision(2) << fixed <<
		area << " acres" << endl << endl;
}


now ive tried doing this
outFile << us_parks[findOldest(us_parks, SIZE)].Print_Parks(outFile);
this doesnt give me an error, it compiles and everything runs. but i will not output to the file.
im a wits end, any advice?
Last edited on
Hirokachi (126)
The way you output to the file isn't working properly as you have described.

I suspect it's because you are treating C++ as a Linux scripting; C++ isn't Linux Scripting. So my advice is to look at the following tutorial:
http://www.cplusplus.com/doc/tutorial/files/

I hope that clears it up,

~ Hirokachi
Topic archived. No new replies allowed.