Generating random numbers

Generating random numbers#

int Random.Shared.Next()

Example output:

for (var i = 0; i < 3; ++i)
    Console.WriteLine(Random.Shared.Next());

615160908
159352573
1157669699

Run again:

1150926324
467954522
1664251303

Activity 30 (Generating random numbers in an interval)

  1. Write code that generates five random numbers in the range [0, 4] and prints them.

  2. Do you think that this way of generating numbers is useful in our problem? Why / how would you use it?

Selecting a random item#

Instead of generating an index to choose items, we can choose an item directly.

T[] Random.Shared.GetItems(T[] choices, int length)

T[] means any type.

Example:

string[] machines = ["CNC-Lathe-01", "CNC-Mill-02", "CNC-Grind-03", "5-Axis-04", "EDM-05"];

const int inspectedMachineCountPerWeek = 2;

var pickedMachinesForInspection = Random.Shared.GetItems(machines, inspectedMachineCountPerWeek);

foreach (var machine in pickedMachinesForInspection)
    Console.WriteLine(machine);

Example Output:

CNC-Lathe-01
CNC-Grind-03

Activity 31

Implement a weekly plan for a spare parts quality check. Example output:

Weekly Schedule:

Mon: hydraulic pump
Tue: PLC module
Wed: servo motor
Fri: control valve

Use the following template.

string[] qcDays = ["Mon", "Tue", "Wed", "Fri"];
string[] parts = ["servo motor", "pressure sensor", "control valve", "flow meter"];

Appendix#

Contents