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 # copeland
-Copeland's method implementation
+
+Copeland's preferential voting method implementation. Outputs Copeland's score and ranking for each candidate.
+
+## Usage
+
+### Create ballot files
+
+Just create plain text files with list of preferences for each voter. One candidate name per line.
+
+Example:
+
+a1.txt
+
+```
+Bob
+Charlie
+Alice
+Donald
+```
+
+a2.txt
+
+```
+Donald
+Alice
+Charlie
+Bob
+```
+
+a3.txt
+
+```
+Alice
+Charlie
+Bob
+Donald
+```
+
+### Run the program
+
+```
+copeland a1.txt a2.txt a3.txt
+```
+
+Example output:
+
+```
+Registered names:
+	ALICE
+	BOB
+	CHARLIE
+	DONALD
+
+Scores:
+	Rank 1:
+		3	ALICE
+	Rank 2:
+		2	CHARLIE
+	Rank 3:
+		1	BOB
+	Rank 4:
+		0	DONALD
+```
+
+Note: candidate which scored against every other candidate (having score *N-1* with default scoring settings, where *N* is number of candidates), also happens to be a Condorcet winner.
+
+## Synopsis
+
+```
+$ copeland -h
+Usage:
+
+copeland [OPTION]... [BALLOT FILE]...
+
+  Process files with preference lists and output Copeland's ranking.
+
+Options:
+  -normalize-case
+    	normalize case (default true)
+  -score-loss float
+    	score for tie against opponent
+  -score-tie float
+    	score for tie against opponent (default 0.5)
+  -score-win float
+    	score for win against opponent (default 1)
+  -version
+    	show program version and exit
+```