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09-function.rb
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+# 题目: 使用者输入直角三角形的宽和高,输出三角形的面积
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+
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+def calculate_area(a, b)
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+ # ....
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+end
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+print "请输入直角三角形的高,然后按 Enter: "
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+a = gets
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+print "请输入直角三角形的底边,然后按 Enter: "
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+b = gets
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+answer = calculate_area(a,b)
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+puts "直角三角形的面积是: #{answer}"
10-function.rb
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+# 题目: 使用者输入 x,y,z,请输出三个数中最大的数
+def find_max(x, y, z)
+print "请输入一个数字x,然后按 Enter: "
+x = gets
+print "请输入一个数字y,然后按 Enter: "
+y = gets
+print "请输入一个数字z,然后按 Enter: "
+z = gets
+# ....
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+answer = find_max(x,y,z)
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+puts "最大的数是 #{answer}"
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