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
128
129
130
131
132
133
134
|
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace temperatures
{
public partial class frm_main : Form
{
public frm_main()
{
InitializeComponent();
}
/* 3 lists used to store temperatures from different cities,
* those cities being Sioux Falls, New York, and Denver
*/
List<int> sf = new List<int>(30);
List<int> ny = new List<int>(30);
List<int> dv = new List<int>(30);
private void frm_main_Load(object sender, EventArgs e)
{
Random r = new Random();
/* fill the cities with temperature data */
for (int i = 0; i < 30; ++i) {
sf.Add(r.Next(2, 70));
ny.Add(r.Next(21, 68));
dv.Add(r.Next(18, 74));
}
}
private (int, int) high_and_low(List<int> city)
{
int low = 999;
int high = -999;
/* find the highest and lowest temperatures */
for (int i = 0; i < 30; ++i) {
if (city[i] < low)
low = city[i];
if (city[i] > high)
high = city[i];
}
/* return the two temperatures as a tuple */
return (low, high);
}
/* convert fahrenheit to celsius */
private int f2c(int f)
{
double c = .56*(f-32);
return (int)c;
}
private void show(List<int> city)
{
/* get the highest and lowest temperatures of a city */
(int low, int high) tmptr = high_and_low(city);
/* show the temperatures on the form */
txt_low_f.Text = tmptr.low.ToString() + "°f";
txt_high_f.Text = tmptr.high.ToString() + "°f";
txt_low_c.Text = f2c(tmptr.low).ToString() + "°c";
txt_high_c.Text = f2c(tmptr.high).ToString() + "°c";
}
private void btn_add_Click(object sender, EventArgs e)
{
if (txt_add.Text == "") {
MessageBox.Show("You need to enter a temperature",
"Entry Error");
txt_add.Focus();
return;
}
if (!int.TryParse(txt_add.Text, out int i)) {
MessageBox.Show("The temperature must be a whole number",
"Entry Error");
txt_add.Focus();
return;
}
/* find the selected city */
if (radio_sf.Checked) {
/* remove the oldest temperature */
sf.RemoveAt(0);
/* add a new temperature */
sf.Add(int.Parse(txt_add.Text));
/* redisplay the temperatures */
show(sf);
}
else if (radio_ny.Checked) {
ny.RemoveAt(0);
ny.Add(int.Parse(txt_add.Text));
show(ny);
}
else if (radio_dv.Checked) {
dv.RemoveAt(0);
dv.Add(int.Parse(txt_add.Text));
show(dv);
}
else {
MessageBox.Show("You need to select a city",
"Entry Error");
}
}
private void radio_sf_CheckedChanged(object sender, EventArgs e)
{
show(sf);
}
private void radio_ny_CheckedChanged(object sender, EventArgs e)
{
show(ny);
}
private void radio_dv_CheckedChanged(object sender, EventArgs e)
{
show(dv);
}
private void btn_exit_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
|
