/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 13-3-17
 * Time: 下午6:22
 */
package main

import "fmt"

func main() {
    //定义变量方式
    var a int = 1
    fmt.Println(a)

    b := 2 //：= 这种写法只能在函数内部使用
    fmt.Println(b)

    c, d := 3, 4 //Cool,right?
    fmt.Println(c)
    fmt.Println(d)

    str1 := "this is string1"
    fmt.Println(str1)

    var str2 string = "this is string2"
    fmt.Println(str2)

    var e bool = true
    fmt.Println(e)

    // 声明却未赋值的变量，会编译出错
    // var test string   //compile error:test decleared and not used

}

package main

import "fmt"

func main() {
    var a int //默认值初始化 0
    var str string //默认值为空字符串
    var boo bool //默认值为false


    fmt.Println(a)
    fmt.Println(str)
    fmt.Println(boo)
}

var s string = "hello"
s[0] = 'c'   //修改第一个字符为'c'，这会报错