CSci 431

Exercise set #6

Due: Thursday, Nov. 30

• Write Prolog programs to return the length of a list and to append two lists (look at section 10.3 for help on lists)
• Write Prolog programs to do the following :
• Find the names of london suppliers
• Find the names of suppliers of parts to london projects
• Find the name of suppliers who supply some part also supplied by supplier s2.

Prolog exercises should all be placed in the file <yourusername>.pl in the handins folder, and should include adequate header and internal documentaion.

A first CLIPS exercise (problem 7.9, page 398, of Giarratano and Riley)

Plants require many different types of nutrients for proper growth. Three of the most important plant nutrients that are provided by fertilizer are nitrogen, phosphorus, and potassium. A deficiency in one of these nutrients will produce vraious symptoms. Translate the following heuristics below to rules that determine nutrient deficiency. Assume that the plant is normally green.

• A plant with stunted growth may have a nitrogen deficiency.
• A plant that is pale yellow in color may have a nitrogen deficiency.
• A plant that has reddish-brown leaf edges may have a nitrogen deficiency.
• A plant with stunted root growth may have a phosphorus deficiency.
• A plant with a spindly stalk may have a phosphorus deficiency.
• A plant that is purplish in color may have a phosphorus deficiency.
• A plant that has delayed in maturing may have a phosphorus deficiency.
• A plant with leaf edges that appear scorched may have a pottassium deficiency.
• A plant with weakened stems may have a potassium deficiency.
• A plant with shriveled seeds or fruits may have a potassium deficiency.

Use deftemplates to describe the facts used in the rules. The input to the program should be made by asserting symptoms as facts (using deffacts). The output should indicate which nutrient deficiencies exist by printing to the terminal. Implement a method so that multiple printouts for a single deficiency caused by more than one symptom are avoided. Test your program with the following inputs:

• The plant has stunted root growth
• The plant is purplish in color

 Please call this program <yourusername>.CLP and place it in the handins folder.

Any questions? Please ask!