upload 45-46

45/examples/Cfor.mp

@@ -0,0 +1,27 @@
+for (i = 0; i < 5; i++) {  # 类似c语言的for循环， '()'必须要有
+    if (i > 4) { break }
+    if (i == 2) { continue }
+    printf("i is %d\n", i)
+}
+
+i = 0
+for (; i < 5; i++) {  # 无初期化语句
+    if (i > 4) { break }
+    if (i == 2) { continue }
+    printf("i is %d\n", i)
+}
+
+i = 0
+for (; i < 5;;) {  # 无初期化和更新语句
+    if (i > 4) { break }
+    if (i == 2) { i++ continue }
+    printf("i is %d\n", i)
+    i++ # 更新语句
+}
+
+i = 0
+for (;;;) {  # 等价于'for { block }'语句
+    if (i > 4) { break }
+    printf("i is %d\n", i)
+    i++ # 更新语句
+}

45/examples/basic.mp

@@ -0,0 +1,64 @@
+s1 = "hello, 黄"  # strings are UTF-8 encoded
+println(s1)
+
+三 = 3       # UTF-8 identifier
+println(三)
+
+i = 20000000         # int
+println(i)
+
+b = true               # bool
+println(b)
+
+a = [1, "2"]           # array
+println(a)
+
+if 1 in a {
+    println("1 in [1, \"2\"]")
+}
+if !(2 in a) {
+    println("2 not in [1, \"2\"]")
+}
+
+h = {"a": 1, "b": 2}   # hash
+println(h)
+
+if "b" in h {
+    println("\"b\" in h")
+}
+
+t = (1,2,3)            # tuple
+println(t)
+
+n = nil
+println(n)
+
+#printf builtin
+printf("2**3=%g, 2.34.floor=%.0f\n", 2.pow(3), 2.34.floor())
+
+/* this is a 
+   multiple assignment
+*/
+a, b, c = 2, false, ["x", "y", "z"]
+printf("a=%d,b=%t, c=%v\n", a, b, c)
+
+if "hello" in "hello world" {
+    println("\"hello\" in \"hello world\"")
+}
+
+nums = 1..10
+printf("nums = %s\n", nums)
+
+for item in 1..10 {
+    println(item)
+}
+
+println("--------------------------------")
+for item in 10..5 {
+    println(item)
+}
+
+println("--------------------------------")
+for item in fn(a,b){ a + b }(1,1) .. fn(a,b){ a - b }(10,5) { # 即 'for item in 2..5'
+    println(item)
+}

45/examples/basic2.mp

@@ -0,0 +1,42 @@
+println(10 < 25 < 30)
+println(10 < (10 + 15) <= 25)
+println(10 < 5 <= 8)
+println(10 <= 25 <= 25)
+println("abc" < "def" < "ghi")
+
+fn sum (x,y) { x + y }
+println(10 < sum(10, 15) <= 25)
+
+if 10 < 25 < 30 {
+    println("10 < 25 < 30")
+}
+
+if 10 < 25 <= 25 {
+    println("10 < 25 <= 25")
+}
+
+if 10 < 5 <= 8 {
+    println("10 < 5 <= 8")
+}
+
+if 10 <= 25 <= 25 {
+    println("10 <= 25 <= 25")
+}
+
+if 10 <= 25 != 30 {
+    println("10 <= 25 != 30")
+}
+
+if "abc" < "def" < "ghi" {
+    println("abc < def < ghi")
+}
+
+a = 12
+if 10 != a < 13 {
+    println("10 != a < 13")
+}
+
+#error
+#if "abc" < "def" < "ghi" < "jkl" {
+#    println("abc < def < ghi < jkl")
+#}

45/examples/compound_assign_operators.mp

@@ -0,0 +1,17 @@
+a = 5
+a += 12
+
+b = 8
+b -= 3
+
+c = 12
+c *= 2
+
+d = 16
+d /= 2
+
+printf("a=%d, b=%d, c=%d, d=%d\n", a, b, c, d)
+
+s = "hello"
+s += " world"
+println(s)

45/examples/control_flow.mp

@@ -0,0 +1,95 @@
+#if/else-if
+x = 12
+result = if x > 10 {2} else if x > 5 {3} else {4}
+println(result == 2)
+
+x = 10
+result = if x > 10 {2} else if x > 5 {3} else {4}
+println(result == 3)
+
+x = 3
+result = if x > 10 {2} else if x > 5 {3} else {4}
+println(result == 4)
+
+x = 8
+result = if x >= 8 {2} else if x > 5 {3} else {4}
+println(result == 2)
+
+x = 8
+result = if x <= 8 {2} else if x > 5 {3} else {4}
+println(result == 2)
+
+x = 8
+result = if x == 8 {2} else if x > 5 {3} else {4}
+println(result == 2)
+
+x = 8
+result = if x != 8 {2} else if x > 5 {3} else {4}
+println(result == 3)
+
+#for
+arr = [1, true, "Hello"]; 
+for item in arr {
+    println(item)
+} 
+println()
+
+for idx, item in arr {
+    if idx == 2 { break } 
+    println(item) 
+}
+println()
+
+hash = {"name": "huanghaifeng", "height": 165}
+for k, v in hash {
+    printf("key=%s, value=%v\n", k, v)
+}
+
+str = "Hello"
+for c in str {
+    println(c)
+}
+println()
+
+tup = (1, true, "Hello")
+for item in tup {
+    println(item)
+}
+println()
+
+for idx, item in tup {
+    if idx == 2 { break }
+    println(item)
+}
+println()
+
+#while
+x = 3
+while x-- > 0 {
+    println(x)
+}
+println()
+
+x = 5
+while x-- > 0 {
+    println(x)
+    if x == 2 { break }
+}
+println()
+
+x = 5
+while x-- > 0 {
+    if x == 4 { continue }
+    else if x == 2 { break }
+    println(x)
+}
+println()
+
+#do
+x = 3
+do {
+    x--
+    println(x)
+    if x == 1 { break }
+}
+println()

45/examples/file.mp

@@ -0,0 +1,28 @@
+file, err = open("./file.log", "w+")
+if err {
+    println(err)
+    os.exit(1)
+}
+
+file.writeLine("This is the first line")
+file.writeLine("This is the second line")
+file.writeString("这是第三行\n")
+file.close()
+
+
+printf("=====Reading file=====\n")
+file, err = open("./file.log", "r")
+if err {
+    println(err)
+    os.exit(1)
+}
+
+println(file.readLine())
+println(file.readLine())
+println(file.readLine())
+file.close()
+
+# stdin, stdout
+print("Please type your name:")
+name = stdin.readLine()
+stdout.writeLine("Hello " + name + "!")

45/examples/function.mp

@@ -0,0 +1,35 @@
+#function statement
+fn addFunc(x,y) {
+    return x+ y
+}
+println(addFunc(2,3))
+
+#function literal
+sumFunc = fn(x,y) {
+    return x+ y
+}
+println(sumFunc(2,3))
+
+##function literal with direct call
+sumResult = fn(x,y) { return x+ y }(2,3)
+println(sumResult)
+
+#function with multiple return value
+fn math(x, y) {
+    return x+y, x-y
+}
+a, b = math(5,3)
+printf("a=%g, b=%g\n", a, b)
+
+fn math2(x, y){
+    return x+y, x-y, x * y
+}
+a, _, c = math2(5,3)
+printf("a=%g, c=%g\n", a, c)
+
+# anonymous functions(lambdas)
+let add = fn (x, factor) {
+  x + factor(x)
+}
+result = add(5, x => x * 2)
+println(result)  # result: 15

45/examples/goObj.mp

@@ -0,0 +1,10 @@
+# using go's Printf
+fmt.Printf("Hello %s!\n", "go function")
+
+# using go's Sprintf
+s = fmt.Sprintf("Hello %s!", "World")
+# print with magpie's builtin function `print`
+println(s)
+
+fmt.Println(runtime.GOOS)
+fmt.Println(runtime.GOARCH)

45/examples/import.mp

@@ -0,0 +1,11 @@
+import sub_package.calc
+
+println(Add(2,3))
+
+math = Math(2,3)
+printf("math.Add() = %g\n", math.Add())
+
+printf("Math.add() = %g\n", Math(2,3).Add())
+
+# error, '_add' not exported
+# println(_add(2,3))