Difference between revisions of "FP Laboratory 1"
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| Line 19: | Line 19: | ||
doubleMe x = x * x | doubleMe x = x * x | ||
| − | plus x y = x + y | + | plus x y = x + y + 'a' |
</syntaxhighlight > | </syntaxhighlight > | ||
<translate> | <translate> | ||
| − | + | It should report a problem in function <code>plus</code> (you can not use <code>+</code> with letter, it can be repaired by removing <code>+ 'a'</code>). Report from VS Code is refreshed whenever the source file is saved on disk. | |
</translate> | </translate> | ||
Revision as of 12:19, 28 August 2019
Working environment
Using the installation guide from Functional programming prepare your working environment.
How to verify it is working?
- Run
ghcifrom the command line. it will start GHC Interpreter, the output should be something like this:
GHCi, version 8.6.5: http://www.haskell.org/ghc/ :? for help
Prelude>
- If you write expression, for example
1+2*3, it should be evaluated. You can close this interpreter by typing:q. - Open Visual Studio Code, create a file
simple.hsand put there following lines of code:
doubleMe x = x * x
plus x y = x + y + 'a'
It should report a problem in function plus (you can not use + with letter, it can be repaired by removing + 'a'). Report from VS Code is refreshed whenever the source file is saved on disk.
