Exercises and solutions for the second day.
Write a simple method called Swap() to exchange to given integers. The method should work in such a way, that the following program works:
int a = 0;
int b = 1;
//Calling Swap with a and b
if (a != 1 || b!= 0)
throw new Exception("Swap does not work yet!");
Console.WriteLine("Swap seems to work for this case!");
Write a guess-a-number game. The .NET random generator is available by generating a new instance of the Random class. The game should give the user the opportunity to enter the range of numbers. Based on this range the number of tries should be determined (you can decide how hard the game should be). For each try the user has the ability to guess a number. If the guessed number is the generated number, then the user won the game. If the number of tries has been exceeded, the user lost the game.
Approximate the integral of a function by taking the sum of the areas of rectangles, i.e. compute
F=∫abf(x)dx ≈ ΔxΣif(xi).
Pack everything in a method called Integrate. This method should take 4 input parameters:
- A
double, which represents the start of the integral a. - A
double, which represents the end of the integral b. - An
int, which represents the number of rectangles N. - A
Func<double, double>, which represents the function f.
Use your method to show that the value of the integral is becoming more precise as N increases.
Create a method, which has an int argument (called number) and an out of int argument (called digits). The return type should be an int as well.
This method would then compute the digit sum of all digits in the given number argument. The digits argument should be set to the number of given digits in number, while the result of the computation would be returned.
Create a class, which simplifies receiving user input in the console. The class should have a default constructor and another constructor, which requires a string to be passed. The given string should be used as the message for the user the prompt. In case of the default constructor a default message should be displayed.
The class should have a method called ParseInt() and another method called ParseDouble(). The ParseInt() method will try to get a valid integer value. If no valid integer value is passed in, it will display an error message and prompt the user to enter a valid integer value. Once a valid integer value is passed in, this loop is broken and the value is returned. The ParseDouble() method does the same with a floating point value instead of an integer.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.