有人可以解释如何在C编程中将元素附加到数组吗? [英] Can someone explain how to append an element to an array in C programming?
问题描述
如果我想向初始化为int的数组添加数字,该怎么做?
int arr [ 10] = {0,5,3,64};
arr [] + = 5; //这是它吗?对我不起作用...
我想要{0,5 ,3、64、5}。
我已经习惯了Python,在Python中有一个名为list.append的函数将一个元素附加到自动为您列出。
int arr [10] = {0, 5、3、64};
arr [4] = 5;
编辑:
所以我被要求解释发生了什么这样做时:
int arr [10] = {0,5,3,64};
您创建一个包含10个元素的数组,并为该数组的前4个元素分配值。 / p>
还要记住, arr
从索引 arr [0] $ c开始$ c>并终止于索引
arr [9]
-10个元素
arr [0]的值为0;
arr [1]的值为5;
arr [2]的值为3;
arr [3]的值为64;
之后,该数组包含垃圾值/零,因为您没有分配任何其他值
但是您仍然可以分配另外6个值,所以当您这样做
arr [ 4] = 5;
您将值5分配给数组的第五个元素。
您可以这样做,直到为 arr
的最后一个索引分配值,即 arr [9]
;
很抱歉,如果我的解释不连贯,但我从来都不擅长解释事物。
If I want to append a number to an array initialized to int, how can I do that?
int arr[10] = {0, 5, 3, 64};
arr[] += 5; //Is this it?, it's not working for me...
I want {0,5, 3, 64, 5} in the end.
I'm used to Python, and in Python there is a function called list.append that appends an element to the list automatically for you. Does such function exist in C?
int arr[10] = {0, 5, 3, 64};
arr[4] = 5;
EDIT: So I was asked to explain what's happening when you do:
int arr[10] = {0, 5, 3, 64};
you create an array with 10 elements and you allocate values for the first 4 elements of the array.
Also keep in mind that arr
starts at index arr[0]
and ends at index arr[9]
- 10 elements
arr[0] has value 0;
arr[1] has value 5;
arr[2] has value 3;
arr[3] has value 64;
after that the array contains garbage values / zeroes because you didn't allocated any other values
But you could still allocate 6 more values so when you do
arr[4] = 5;
you allocate the value 5 to the fifth element of the array.
You could do this until you allocate values for the last index of the arr
that is arr[9]
;
Sorry if my explanation is choppy, but I have never been good at explaining things.
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