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Write a program that creates 2 custom struct types:
The square
type should be a struct with a field called sideLength
of type float64
The triangle
type should be a struct with a field called height
of type float64
and a field called base
of type float64
Both types should have function called getArea
that returns the calculated area of the square or triangle
Area of Triangle = 0.5 base height
Area of Square = sideLength * sideLength
Add a shape
interface that defines a function called printArea
This function should calculate the area of the given shape and print out to the terminal
Design the interface so that the printArea
function can be called with either a triangle or a square
Create a program that reads the contents of a text file then print its contents to the terminal
The file to open should be provider as an argument to the program when it is executed at the terminal
For example, go run main.go myfile.txt
To read-in the arguments provided to a program, you can reference the variable os.Args
, which is a slice of strings
To open a file, check out the documentation for the Open
function in the os
package
What interfaces does the File
type implement?
If the File
type implements the Reader
interface, you might be able to reuse that io.Copy
function
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