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以下代码结果是什么
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如何输出012
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N=10
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全局只可以是以下类型:
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修改:加锁
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这个可以:
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这个错误:
for i := 10,j := 10;i < 100;i++{
}
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语法可以,但没意义
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数组切片也是引用类型
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package main
func main() {
var fn1 = func() {}
var fn2 = func() {}
if fn1 != fn2 {
println("fn1 not equal fn2")
}
}
参考答案及解析:编译错误
invalid operation: fn1 != fn2 (func can only be compared to nil)
函数只能与 nil 比较。
type T struct {
n int
}
m := make(map[int]T)
m[0].n = 1
fmt.Println(m[0].n)
编译错误:cannot assign to struct field m[0].n in map
map[key]struct 中 struct 是不可寻址的,所以无法直接赋值。
修改为:
m := make(map[int]T)
t := T{1}
m[0] = t
fmt.Println(m[0].n)
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