Add chinese translation for 08-numbers-and-strings (numbers part)

translation/chinese/08-数字和字符串/01-数字/01-arithmetic-operators/01/main.go

@@ -0,0 +1,33 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	// 当一个整数和一个浮点数一起使用时
+	// 在一个表达式中，其结果总是变成一个浮点数
+	fmt.Println(8 * -4.0) // -32.0 not -32
+
+	// 两个整数值的结果是一个整数值
+	fmt.Println(-4 / 2)
+
+	// 取余运算符
+	// 它只能用于整数
+	fmt.Println(5 % 2)
+	// fmt.Println(5.0 % 2) // 错误的
+
+	// 加法运算符
+	fmt.Println(1 + 2.5)
+	fmt.Println(2 - 3)
+
+	// 负数运算符
+	fmt.Println(-(-2))
+	fmt.Println(- -2) // 这也可以
+}

translation/chinese/08-数字和字符串/01-数字/01-arithmetic-operators/02/main.go

@@ -0,0 +1,23 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	var (
+		myAge   = 30
+		yourAge = 35
+		average float64
+	)
+
+	average = float64(myAge+yourAge) / 2
+
+	fmt.Println(average)
+}

translation/chinese/08-数字和字符串/01-数字/01-arithmetic-operators/03-float-inaccuracy/01/main.go

@@ -0,0 +1,26 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	ratio := 1.0 / 10.0
+
+	// 经过10次操作后
+	// 不准确的地方很明显
+	//
+	// 不过,现在不要介意这个循环的语法
+	// 我将在事后解释
+	for range [...]int{10: 0} {
+		ratio += 1.0 / 10.0
+	}
+
+	fmt.Printf("%.60f", ratio)
+}

translation/chinese/08-数字和字符串/01-数字/01-arithmetic-operators/03-float-inaccuracy/02/main.go

@@ -0,0 +1,24 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	// Go编译器将这些数字视为整数,
+	// 因为整数值中没有小数部分
+	// 所以, 结果是1, 而不是1.5
+
+	// 所以, 这里的ratio变量是一个int变量
+	// 这是因为, 3除以2的结果是一个整数
+
+	ratio := 3 / 2
+
+	fmt.Printf("%d", ratio)
+}

translation/chinese/08-数字和字符串/01-数字/01-arithmetic-operators/03-float-inaccuracy/03/main.go

@@ -0,0 +1,27 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	// 当你在计算中使用一个浮点数和一个整数时
+	// 结果总是一个浮点数。
+
+	ratio := 3.0 / 2
+
+	// OR:
+	// ratio = 3 / 2.0
+
+	// OR - 如果3在一个int变量里:
+	// n := 3
+	// ratio = float64(n) / 2
+
+	fmt.Printf("%f", ratio)
+}

translation/chinese/08-数字和字符串/01-数字/02-arithmetic-operators-examples/01/main.go

@@ -0,0 +1,31 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("sum :", 3+2)   // sum - int
+	fmt.Println("sum :", 2+3.5) // sum - float64
+	fmt.Println("dif :", 3-1)   // difference - int
+	fmt.Println("dif :", 3-0.5) // difference - float64
+	fmt.Println("prod:", 4*5)   // product - int
+	fmt.Println("prod:", 5*2.5) // product - float64
+	fmt.Println("quot:", 8/2)   // quotient - int
+	fmt.Println("quot:", 8/1.5) // quotient - float64
+
+	// 余数仅适用于整数
+	fmt.Println("rem :", 8%3)
+	// fmt.Println("rem:", 8.0%3) // error
+
+	// 你可以这样做
+	// 因为浮点数的小数部分为零
+	f := 8.0
+	fmt.Println("rem :", int(f)%3)
+}

translation/chinese/08-数字和字符串/01-数字/02-arithmetic-operators-examples/02/main.go

@@ -0,0 +1,34 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	// 这个ratio的值是什么?
+	// 3 / 2 = 1.5?
+	var ratio float64 = 3 / 2
+	fmt.Println(ratio)
+
+	// 说明
+	// 上述表达式等于这个
+	ratio = float64(int(3) / int(2))
+	fmt.Println(ratio)
+
+	// 如何修复？
+	//
+	// 记住，当其中一个值是浮点数的时候
+	// 结果就会变成浮点数
+	ratio = float64(3) / 2
+	fmt.Println(ratio)
+
+	// or
+	ratio = 3.0 / 2
+	fmt.Println(ratio)
+}

translation/chinese/08-数字和字符串/01-数字/03-precedence/01/main.go

@@ -0,0 +1,28 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println(
+		2+2*4/2,
+		2+((2*4)/2), // 同上
+	)
+
+	fmt.Println(
+		1+4-2,
+		(1+4)-2, // 同上
+	)
+
+	fmt.Println(
+		(2+2)*4/2,
+		(2+2)*(4/2), // 同上
+	)
+}

translation/chinese/08-数字和字符串/01-数字/03-precedence/02/main.go

@@ -0,0 +1,21 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	n, m := 1, 5
+
+	fmt.Println(2 + 1*m/n)
+	fmt.Println(2 + ((1 * m) / n)) // 同上
+
+	// 让我们用括号来改变优先顺序
+	fmt.Println(((2 + 1) * m) / n)
+}

translation/chinese/08-数字和字符串/01-数字/03-precedence/03/main.go

@@ -0,0 +1,31 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+func main() {
+	// // 优先级: 表达式的顺序
+	// // 乘法运算符优先运行: * and /
+
+	// fmt.Println(
+	// 	1 + 5 - 3*10/2,
+	// )
+
+	// // 3 * 10 = 30
+	// // 30 / 2 = 15
+	// // 1 + 5  = 6
+	// // 6 - 15 = -9
+
+	// // **** TIP ****
+	// // 使用括号来改变顺序
+	// // 首先, (1+5-3), 然后 (10/2) 将被计算出来
+
+	// fmt.Println(
+	// 	(1 + 5 - 3) * (10 / 2),
+	// )
+}

translation/chinese/08-数字和字符串/01-数字/03-precedence/04/main.go

@@ -0,0 +1,21 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	celsius := 35.
+
+	// 错误的公式:  9*celsius + 160  / 5
+	// 正确的公式: (9*celsius + 160) / 5
+	fahrenheit := (9*celsius + 160) / 5
+
+	fmt.Printf("%g ºC is %g ºF\n", celsius, fahrenheit)
+}

translation/chinese/08-数字和字符串/01-数字/04-incdec-statement/01/main.go

@@ -0,0 +1,24 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	var n int
+
+	// 替代方案:
+	// n = n + 1
+	// n += 1
+
+	// 较好的:
+	n++
+
+	fmt.Println(n)
+}

translation/chinese/08-数字和字符串/01-数字/04-incdec-statement/02/main.go

@@ -0,0 +1,24 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+func main() {
+	n := 10
+
+	// 替代方案:
+	// n = n - 1
+	// n -= 1
+
+	// 较好的:
+	n--
+
+	fmt.Println(n)
+}

translation/chinese/08-数字和字符串/01-数字/04-incdec-statement/03/main.go

@@ -0,0 +1,31 @@
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+// For more tutorials  : https://learngoprogramming.com
+// In-person training  : https://www.linkedin.com/in/inancgumus/
+// Follow me on twitter: https://twitter.com/inancgumus
+
+package main
+
+import "fmt"
+
+// 自增自减运算符是一个语句
+
+func main() {
+	var counter int
+
+	// 以下的 "语句" 是正确的:
+
+	counter++ // 1
+	counter++ // 2
+	counter++ // 3
+	counter-- // 2
+	fmt.Printf("There are %d line(s) in the file\n",
+		counter)
+
+	// 以下的 "表达式" 是不正确的:
+
+	// counter = 5+counter--
+	// counter = ++counter + counter--
+}