如何从C中的数组中删除元素? [英] How to remove an element from an array in C?

问题描述

似乎找不到方法....

Can't seem to find a way on how to do it....

例如，如果我有一个数组

for example if I have an array

a = { 1,2,3 }

并且我想删除a [1]，所以结果应该是

and I want to delete a[1] so the result would be

a = { 1,3 }

这怎么办?

推荐答案

您可以根据要删除的索引移动所需的元素，如下所示:

You could just shift the desired elements depending on the index to delete like so:

仅将其复制到新数组时，功能更强大，因此在处理一个数组时不再需要忽略最后一个元素.

more robust to just copy over to a new array, then would no longer need to ignore last element when just working with one array.

int a = {1, 2, 3};
int new_a[sizeof(a)/sizeof(a[0]) - 1]; // new array will hold one less value
int pos = 3; // delete the item at the third index

for (i = pos - 1; i < sizeof(a)/sizeof(a[0]) - 1; i++) {
    new_a[i] = a[i+1];
}

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