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Mar 28, 2024
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Add project file and modernize code #9770

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f634375
add project file; modernize code
gewarren Mar 27, 2024
a5a02d4
Update snippets/csharp/System/Random/Overview/project.csproj
gewarren Mar 28, 2024
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4 changes: 2 additions & 2 deletions snippets/csharp/System/Random/Overview/Next2.cs
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Original file line number Diff line number Diff line change
@@ -1,11 +1,11 @@
using System;

public class Example
public class Example9
{
public static void Main()
{
//<Snippet2>
Random rnd = new Random();
Random rnd = new();

Console.WriteLine("\n20 random integers from -100 to 100:");
for (int ctr = 1; ctr <= 20; ctr++)
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104 changes: 54 additions & 50 deletions snippets/csharp/System/Random/Overview/Random1.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,59 +2,63 @@

public class Class1
{
public static void Main()
{
// <Snippet1>
byte[] bytes1 = new byte[100];
byte[] bytes2 = new byte[100];
Random rnd1 = new Random();
Random rnd2 = new Random();
public static void Main()
{
// <Snippet1>
byte[] bytes1 = new byte[100];
byte[] bytes2 = new byte[100];
Random rnd1 = new();
Random rnd2 = new();

rnd1.NextBytes(bytes1);
rnd2.NextBytes(bytes2);
rnd1.NextBytes(bytes1);
rnd2.NextBytes(bytes2);

Console.WriteLine("First Series:");
for (int ctr = bytes1.GetLowerBound(0);
ctr <= bytes1.GetUpperBound(0);
ctr++) {
Console.Write("{0, 5}", bytes1[ctr]);
if ((ctr + 1) % 10 == 0) Console.WriteLine();
}
Console.WriteLine("First Series:");
for (int ctr = bytes1.GetLowerBound(0);
ctr <= bytes1.GetUpperBound(0);
ctr++)
{
Console.Write($"{bytes1[ctr],5}");
if ((ctr + 1) % 10 == 0)
Console.WriteLine();
}

Console.WriteLine();
Console.WriteLine();

Console.WriteLine("Second Series:");
for (int ctr = bytes2.GetLowerBound(0);
ctr <= bytes2.GetUpperBound(0);
ctr++) {
Console.Write("{0, 5}", bytes2[ctr]);
if ((ctr + 1) % 10 == 0) Console.WriteLine();
}
Console.WriteLine("Second Series:");
for (int ctr = bytes2.GetLowerBound(0);
ctr <= bytes2.GetUpperBound(0);
ctr++)
{
Console.Write("{bytes2[ctr], 5}");
if ((ctr + 1) % 10 == 0)
Console.WriteLine();
}

// The example displays output like the following:
// First Series:
// 97 129 149 54 22 208 120 105 68 177
// 113 214 30 172 74 218 116 230 89 18
// 12 112 130 105 116 180 190 200 187 120
// 7 198 233 158 58 51 50 170 98 23
// 21 1 113 74 146 245 34 255 96 24
// 232 255 23 9 167 240 255 44 194 98
// 18 175 173 204 169 171 236 127 114 23
// 167 202 132 65 253 11 254 56 214 127
// 145 191 104 163 143 7 174 224 247 73
// 52 6 231 255 5 101 83 165 160 231
//
// Second Series:
// 97 129 149 54 22 208 120 105 68 177
// 113 214 30 172 74 218 116 230 89 18
// 12 112 130 105 116 180 190 200 187 120
// 7 198 233 158 58 51 50 170 98 23
// 21 1 113 74 146 245 34 255 96 24
// 232 255 23 9 167 240 255 44 194 98
// 18 175 173 204 169 171 236 127 114 23
// 167 202 132 65 253 11 254 56 214 127
// 145 191 104 163 143 7 174 224 247 73
// 52 6 231 255 5 101 83 165 160 231
// </Snippet1>
}
// The example displays output like the following:
// First Series:
// 97 129 149 54 22 208 120 105 68 177
// 113 214 30 172 74 218 116 230 89 18
// 12 112 130 105 116 180 190 200 187 120
// 7 198 233 158 58 51 50 170 98 23
// 21 1 113 74 146 245 34 255 96 24
// 232 255 23 9 167 240 255 44 194 98
// 18 175 173 204 169 171 236 127 114 23
// 167 202 132 65 253 11 254 56 214 127
// 145 191 104 163 143 7 174 224 247 73
// 52 6 231 255 5 101 83 165 160 231
//
// Second Series:
// 97 129 149 54 22 208 120 105 68 177
// 113 214 30 172 74 218 116 230 89 18
// 12 112 130 105 116 180 190 200 187 120
// 7 198 233 158 58 51 50 170 98 23
// 21 1 113 74 146 245 34 255 96 24
// 232 255 23 9 167 240 255 44 194 98
// 18 175 173 204 169 171 236 127 114 23
// 167 202 132 65 253 11 254 56 214 127
// 145 191 104 163 143 7 174 224 247 73
// 52 6 231 255 5 101 83 165 160 231
// </Snippet1>
}
}
4 changes: 2 additions & 2 deletions snippets/csharp/System/Random/Overview/Random2.cs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
using System;

public class Class1
public class Class2
{
public static void Main()
{
Expand All @@ -9,7 +9,7 @@ public static void Main()
var rand = new Random();

// Generate and display 5 random byte (integer) values.
var bytes = new byte[5];
byte[] bytes = new byte[5];
rand.NextBytes(bytes);
Console.WriteLine("Five random byte values:");
foreach (byte byteValue in bytes)
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27 changes: 13 additions & 14 deletions snippets/csharp/System/Random/Overview/array1.cs
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Original file line number Diff line number Diff line change
@@ -1,22 +1,21 @@
using System;

public class Example
public class Example1
{
public static void Main()
{
// <Snippet10>
String[] cities = { "Atlanta", "Boston", "Chicago", "Detroit",
public static void Main()
{
// <Snippet10>
string[] cities = [ "Atlanta", "Boston", "Chicago", "Detroit",
"Fort Wayne", "Greensboro", "Honolulu", "Indianapolis",
"Jersey City", "Kansas City", "Los Angeles",
"Milwaukee", "New York", "Omaha", "Philadelphia",
"Raleigh", "San Francisco", "Tulsa", "Washington" };
Random rnd = new Random();
int index = rnd.Next(0, cities.Length);
Console.WriteLine("Today's city of the day: {0}",
cities[index]);
"Raleigh", "San Francisco", "Tulsa", "Washington" ];
Random rnd = new();
int index = rnd.Next(0, cities.Length);
Console.WriteLine($"Today's city of the day: {cities[index]}");

// The example displays output like the following:
// Today's city of the day: Honolulu
// </Snippet10>
}
// The example displays output like the following:
// Today's city of the day: Honolulu
// </Snippet10>
}
}
61 changes: 31 additions & 30 deletions snippets/csharp/System/Random/Overview/booleans1.cs
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Original file line number Diff line number Diff line change
@@ -1,44 +1,45 @@
// <Snippet8>
using System;

public class Example
public class Example2
{
public static void Main()
{
// Instantiate the Boolean generator.
BooleanGenerator boolGen = new BooleanGenerator();
int totalTrue = 0, totalFalse = 0;
public static void Main()
{
// Instantiate the Boolean generator.
BooleanGenerator boolGen = new();
int totalTrue = 0, totalFalse = 0;

// Generate 1,0000 random Booleans, and keep a running total.
for (int ctr = 0; ctr < 1000000; ctr++) {
bool value = boolGen.NextBoolean();
if (value)
totalTrue++;
else
totalFalse++;
}
Console.WriteLine("Number of true values: {0,7:N0} ({1:P3})",
totalTrue,
((double) totalTrue)/(totalTrue + totalFalse));
Console.WriteLine("Number of false values: {0,7:N0} ({1:P3})",
totalFalse,
((double) totalFalse)/(totalTrue + totalFalse));
}
// Generate 1,0000 random Booleans, and keep a running total.
for (int ctr = 0; ctr < 1000000; ctr++)
{
bool value = boolGen.NextBoolean();
if (value)
totalTrue++;
else
totalFalse++;
}
Console.WriteLine("Number of true values: {0,7:N0} ({1:P3})",
totalTrue,
((double)totalTrue) / (totalTrue + totalFalse));
Console.WriteLine("Number of false values: {0,7:N0} ({1:P3})",
totalFalse,
((double)totalFalse) / (totalTrue + totalFalse));
}
}

public class BooleanGenerator
{
Random rnd;
Random rnd;

public BooleanGenerator()
{
rnd = new Random();
}
public BooleanGenerator()
{
rnd = new Random();
}

public bool NextBoolean()
{
return rnd.Next(0, 2) == 1;
}
public bool NextBoolean()
{
return rnd.Next(0, 2) == 1;
}
}
// The example displays output like the following:
// Number of true values: 500,004 (50.000 %)
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59 changes: 30 additions & 29 deletions snippets/csharp/System/Random/Overview/booleans2.cs
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Original file line number Diff line number Diff line change
@@ -1,37 +1,38 @@
using System;

public class Example
public class Example3
{
public static void Main()
{
// <Snippet20>
Random rnd = new Random();
public static void Main()
{
// <Snippet20>
Random rnd = new();

int totalTrue = 0, totalFalse = 0;
int totalTrue = 0, totalFalse = 0;

// Generate 1,000,000 random Booleans, and keep a running total.
for (int ctr = 0; ctr < 1000000; ctr++) {
bool value = NextBoolean();
if (value)
totalTrue++;
else
totalFalse++;
}
Console.WriteLine("Number of true values: {0,7:N0} ({1:P3})",
totalTrue,
((double) totalTrue)/(totalTrue + totalFalse));
Console.WriteLine("Number of false values: {0,7:N0} ({1:P3})",
totalFalse,
((double) totalFalse)/(totalTrue + totalFalse));
// Generate 1,000,000 random Booleans, and keep a running total.
for (int ctr = 0; ctr < 1000000; ctr++)
{
bool value = NextBoolean();
if (value)
totalTrue++;
else
totalFalse++;
}
Console.WriteLine("Number of true values: {0,7:N0} ({1:P3})",
totalTrue,
((double)totalTrue) / (totalTrue + totalFalse));
Console.WriteLine("Number of false values: {0,7:N0} ({1:P3})",
totalFalse,
((double)totalFalse) / (totalTrue + totalFalse));

bool NextBoolean()
{
return rnd.Next(0, 2) == 1;
}
bool NextBoolean()
{
return rnd.Next(0, 2) == 1;
}

// The example displays output like the following:
// Number of true values: 499,777 (49.978 %)
// Number of false values: 500,223 (50.022 %)
// </Snippet20>
}
// The example displays output like the following:
// Number of true values: 499,777 (49.978 %)
// Number of false values: 500,223 (50.022 %)
// </Snippet20>
}
}
52 changes: 27 additions & 25 deletions snippets/csharp/System/Random/Overview/bytes1.cs
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Original file line number Diff line number Diff line change
@@ -1,41 +1,43 @@
// <Snippet9>
using System;

public class Example
public class Example4
{
public static void Main()
{
Random2 rnd = new Random2();
Byte[] bytes = new Byte[10000];
int[] total = new int[101];
rnd.NextBytes(bytes, 0, 101);
public static void Main()
{
Random2 rnd = new();
byte[] bytes = new byte[10000];
int[] total = new int[101];
rnd.NextBytes(bytes, 0, 101);

// Calculate how many of each value we have.
foreach (var value in bytes)
total[value]++;
// Calculate how many of each value we have.
foreach (byte value in bytes)
total[value]++;

// Display the results.
for (int ctr = 0; ctr < total.Length; ctr++) {
Console.Write("{0,3}: {1,-3} ", ctr, total[ctr]);
if ((ctr + 1) % 5 == 0) Console.WriteLine();
}
}
// Display the results.
for (int ctr = 0; ctr < total.Length; ctr++)
{
Console.Write($"{ctr,3}: {total[ctr],-3}");
if ((ctr + 1) % 5 == 0) Console.WriteLine();
}
}
}

public class Random2 : Random
{
public Random2() : base()
{}
public Random2() : base()
{ }

public Random2(int seed) : base(seed)
{}
public Random2(int seed) : base(seed)
{ }

public void NextBytes(byte[] bytes, byte minValue, byte maxValue)
{
for (int ctr = bytes.GetLowerBound(0); ctr <= bytes.GetUpperBound(0); ctr++)
bytes[ctr] = (byte) Next(minValue, maxValue);
}
public void NextBytes(byte[] bytes, byte minValue, byte maxValue)
{
for (int ctr = bytes.GetLowerBound(0); ctr <= bytes.GetUpperBound(0); ctr++)
bytes[ctr] = (byte)Next(minValue, maxValue);
}
}

// The example displays output like the following:
// 0: 115 1: 119 2: 92 3: 98 4: 92
// 5: 102 6: 103 7: 84 8: 93 9: 116
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