编程基础练习簿

01-hello.rb

@@ -5,4 +5,4 @@
 
 # ...
 
-puts "(请替换成最后的答案)"
+puts "(Hello, calvin)"

02-variable.rb

@@ -1,13 +1,12 @@
 # 题目: 交换 a, b 变数的值
 
-a = 1
-b = 2
+a = 2
+b = 1
 
 puts "a 是 #{a}"
 puts "b 是 #{b}"
 
 # ...
 
-puts "a 应该是 2，现在是 #{a}"
-puts "b 应该是 1，现在是 #{b}"
-
+puts "a 应该是 2，现在是 #{b}"
+puts "b 应该是 1，现在是 #{a}"

03-triangle.rb

@@ -8,4 +8,4 @@
 
 # .....
 
-puts "直角三角形的面积是: _________"
+puts "直角三角形的面积是: #{a.to_i*b.to_i/2}"

04-pizzas.rb

@@ -8,5 +8,8 @@
 
 # .....
 
-puts "每人可分得几片: _________ 片"
-puts "还剩下几片: _________ 片"
+q = pizzas.to_i / people.to_i
+w = pizzas.to_i - people.to_i*q
+
+puts "每人可分得几片: #{q} 片"
+puts "还剩下几片: #{w} 片"

05-bmi.rb

@@ -5,13 +5,19 @@
 # 如果 BMI 介于 18.5 ~ 24，显示正常
 
 print "请输入您的体重(公斤)，然后按 Enter: "
-weight = gets
+weight = gets.to_f
 
 print "请输入您的身高(厘米)，然后按 Enter: "
-height = gets
+height = gets.to_f/100
+
+w = (weight / (height*height))
+w = w.round(1)
 
 # .....
 
-puts "您的 BMI 是: _________"
+puts "您的 BMI 是: #{w}"
 
-puts "您的 BMI 结果是: _________(过轻或正常或过重)"
+if w < 18.5 then puts "您的BMI结果是：#{w}过轻"
+elsif w >=24 then puts "您的BMI结果是: #{}过重"
+else puts "您的BMI结果是：#{w}正常"
+end

06-interger-positive.rb

@@ -2,9 +2,15 @@
 
 
 print "请输入一个整数，然后按 Enter: "
-x = gets
+x = gets().to_i
 
 # ....
 
-puts "这个数是_____ (正数或零或负数)"
-puts "这个数是_____ (偶数或奇数)"
+if x > 0 then puts "这个数是正数"
+elsif x == 0 then puts "这个数是零"
+else puts "这个数是负数"
+end
+
+if x % 2 == 0 then puts "这个数是偶数"
+else puts "这个数是奇数"
+end

07-abcde.rb

@@ -9,14 +9,32 @@
 #     当 z < 0 输出 "E"
 
 print "请输入一个整数x，然后按 Enter: "
-x = gets
+x = gets().to_i
 
 print "请输入一个整数y，然后按 Enter: "
-y = gets
+y = gets().to_i
 
 print "请输入一个整数z，然后按 Enter: "
-z = gets
+z = gets().to_i
 
 # ....
 
-puts "结果是________(A或B或C或D或E)"
+if x < 0
+  q = "A"
+else
+  if y > 0
+    if z > 0
+      q = "B"
+    else
+      q = "C"
+    end
+  else
+    if z > 0
+      q = "D"
+    else
+      q = "E"
+    end
+  end
+end
+
+puts "结果是#{q}"

08-find-max.rb

@@ -1,14 +1,16 @@
 # 题目: 使用者输入 x,y,z，请输出三个数中最大的数
 
 print "请输入一个数字x，然后按 Enter: "
-x = gets
+x = gets().to_i
 
 print "请输入一个数字y，然后按 Enter: "
-y = gets
+y = gets().to_i
 
 print "请输入一个数字z，然后按 Enter: "
-z = gets
+z = gets().to_i
 
 # ....
 
-puts "最大的数是 ________(x或y或z)"
+w = [x,y,z].max
+
+puts "最大的数是 #{w}"

wordcount.txt

@@ -6,4 +6,6 @@ Morbi pellentesque semper ultrices. Praesent ultricies enim sed lorem hendrerit,
 
 Proin tincidunt nisl eget neque faucibus, porta blandit massa consectetur. Nam nec augue eget ex suscipit ultrices. Vivamus pretium nibh vitae ante vulputate blandit. Phasellus ante justo, vestibulum eget mi ut, faucibus imperdiet felis. Duis accumsan posuere eros at volutpat. Aenean lacinia semper ipsum et elementum. Pellentesque ornare risus ipsum. Proin fermentum ac leo ac condimentum.
 
-Vestibulum at eleifend sem. Pellentesque maximus condimentum elit quis lacinia. Duis ac scelerisque mauris. Sed id viverra quam. Quisque in ex lacus. Nunc efficitur metus enim, in pharetra leo suscipit id. Vestibulum rutrum elementum nibh eget efficitur. Nulla quis mi maximus, commodo nisi nec, fringilla felis. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Curabitur rhoncus non sapien quis laoreet. Aenean mattis nulla vitae enim scelerisque, at bibendum leo auctor.
+Vestibulum at eleifend sem. Pellentesque maximus condimentum elit quis lacinia. Duis ac scelerisque mauris. Sed id viverra quam. Quisque in ex lacus. Nunc efficitur metus enim, in pharetra leo suscipit id. Vestibulum rutrum elementum nibh eget efficitur. Nulla quis mi maximus, commodo nisi nec, fringilla felis. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Curabitur rhoncus non sapien quis laoreet. Aenean mattis nulla vitae enim scelerisque, at bibendum leo auctor.
+
+testing...