下面的数组初始化方法在上下文和数组边界检查方面有何不同？ [英] How does below method of array initialization differ in context to array bounds checking?

问题描述

为什么 int arr [2] = {10,20,30,40,50} 会导致错误？
为什么无法通过数组绑定检查来进行此初始化转义错误？

Why does int arr[2]={10,20,30,40,50} leads to error? Why can't this initialization escape error by Array Bound Checking?

int arr[2] ;
arr[0]=10, arr[1]=20, arr[3]=30, arr[4]=40;

通过数组绑定检查在C语言的上下文中不会引起错误吗？

Doesn't cause error in context to C language by array bound checking?

推荐答案

C中没有运行时数组边界检查。您可以随意清除内存中的任何内容。您显示的第一个示例是编译时结构，因此编译器知道您声明了一个大小为2的数组，并且初始化具有> 2个元素。

There is no runtime array bounds check in C. You are free to obliterate whatever is in memory. The 1st example you show, is a compile-time structure, so the compiler know that you declared an array of size 2, and that the initialization has > 2 elements.

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