// 算術運算符
func base() {
	a := 1
	b := 20
	c := 31
	d := -1
	fmt.Printf(" + -> %d\n", a+b)
	fmt.Printf(" - -> %d\n", b-a)
	fmt.Printf(" * -> %d\n", b*d)
	fmt.Printf(" / -> %d\n", c/b)
	fmt.Printf(" %% -> %d\n", c%b)
	a++
	fmt.Printf("++ -> %d\n", a)
	a--
	fmt.Printf("++ -> %d\n", a)
}

// 關系運算符
func relation() {
	a := 1
	b := 3
	c := 5
	d := 5
	fmt.Printf("== -> %v\n", a == b)
	fmt.Printf("!= -> %v\n", a != c)
	fmt.Printf("> -> %v\n", b > a)
	fmt.Printf("< -> %v\n", b < d)
	fmt.Printf(">= -> %v\n", c >= d)
	fmt.Printf("<= -> %v\n", c <= a)
}

//邏輯運算符
func logic() {
	A := true
	B := false
	fmt.Printf("&& -> %v\n", A && B)
	fmt.Printf("|| -> %v\n", A || B)
	fmt.Printf("復合 -> %v\n", (A || B) && !(A && A))
}

// 位運算
func bit_operation() {
	var a uint = 50                  /* 00110010 */
	var b uint = 10                  /* 00001010 */
	fmt.Printf("與& -> %d\n", a&b)    /* 00000010 */
	fmt.Printf("或| -> %d\n", a|b)    /* 00111010 */
	fmt.Printf("異或^ -> %d\n", a^b)   /* 00111000 */
	fmt.Printf("左移<< -> %d\n", a<<2) /* 11001000 */
	fmt.Printf("右移>> -> %d\n", a>>2) /* 00001100 */
}

// 賦值運算符
func assignment() {
	var a int = 50 /* 00110010 */
	var b int
	b = a
	fmt.Printf("= -> %d\n", b)
	b += a
	fmt.Printf("+= -> %d\n", b)
	b -= a
	fmt.Printf("-= -> %d\n", b)
	b *= a
	fmt.Printf("*= -> %d\n", b)
	b /= a
	fmt.Printf("/= -> %d\n", b)
	b = 50
	b <<= 2
	fmt.Printf("<<= -> %d\n", b)
	b >>= 2
	fmt.Printf(">>= -> %d\n", b)
	b &= 2
	fmt.Printf("&= -> %d\n", b)
	b |= 2
	fmt.Printf("|= -> %d\n", b)
	b ^= 2
	fmt.Printf("^= -> %d\n", b)
}

//特殊運算符
func special() {
	var a int = 1
	var ptr int
	var ptr1 *int
 
	ptr = a
	ptr1 = &a
 
	fmt.Printf("1 -> ptr=%d ,ptr1=%d\n", ptr, *ptr1)
	a = 100
	fmt.Printf("2 -> ptr=%d ,ptr1=%d\n", ptr, *ptr1)
}