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59 lines
2.4 KiB
Plaintext
59 lines
2.4 KiB
Plaintext
# bridge - generate random bridge hands
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BEGIN { split(permute(52,52), deck) # generate a random deck
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sort(1,13); sort(14,26); sort(27,39); sort(40,52) # sort hands
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prhands() # format and print the four hands
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}
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function permute(k, n, i, p, r) { # generate a random permutation
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srand(1); # leave out "1" for more randomness
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p = " " # of k integers between 1 and n
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for (i = n-k+1; i <= n; i++)
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if (p ~ " " (r = int(i*rand())+1) " " )
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sub(" " r " ", " " r " " i " ", p) # put i after r in p
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else p = " " r p # put r at beginning of p
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return p
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}
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function sort(left,right, i,j,t) { # sort hand in deck[left..right]
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for (i = left+1; i <= right; i++)
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for (j = i; j > left && deck[j-1] < deck[j]; j--) {
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t = deck[j-1]; deck[j-1] = deck[j]; deck[j] = t
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}
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}
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function prhands() { # print the four hands
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b = sprintf("%20s", " "); b40 = sprintf("%40s", " ")
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card = 1 # global index into deck
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suits(13); print b " NORTH"
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print b spds; print b hrts; print b dnds; print b clbs
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suits(26) # create the west hand from deck[14..26]
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ws = spds substr(b40, 1, 40 - length(spds))
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wh = hrts substr(b40, 1, 40 - length(hrts))
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wd = dnds substr(b40, 1, 40 - length(dnds))
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wc = clbs substr(b40, 1, 40 - length(clbs))
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suits(39); print " WEST" sprintf("%36s", " ") "EAST"
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print ws spds; print wh hrts; print wd dnds; print wc clbs
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suits(52); print b " SOUTH"
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print b spds; print b hrts; print b dnds; print b clbs
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}
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function suits(j) { # collect suits of hand in deck[j-12..j]
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for (spds = "S:"; deck[card] > 39 && card <= j; card++)
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spds = spds " " fvcard(deck[card])
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for (hrts = "H:"; deck[card] > 26 && card <= j; card++)
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hrts = hrts " " fvcard(deck[card])
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for (dnds = "D:"; deck[card] > 13 && card <= j; card++)
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dnds = dnds " " fvcard(deck[card])
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for (clbs = "C:"; card <= j; card++)
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clbs = clbs " " fvcard(deck[card])
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}
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function fvcard(i) { # compute face value of card i
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if (i % 13 == 0) return "A"
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else if (i % 13 == 12) return "K"
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else if (i % 13 == 11) return "Q"
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else if (i % 13 == 10) return "J"
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else return (i % 13) + 1
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}
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