从位于Dynamic数组中间的内存中释放一些值。 [英] Free some values from memory located in the middle of a Dynamic array.

问题描述

我有一个动态分配的数组，类型为 int ，名为 data 。我用3 int s分配了它，并为它们分配了如下值。

代码：

I''ve got a dynamically allocated array of type int called data. I allocated it with 3 ints, and assigned them some values as below.
Code :

int * data = (int *) malloc(sizeof(int) * 3); //Now there are 3 elements in the array 'data'.

//Assigning values
data[0] = 1;
data[1] = 2;
data[2] = 3;

问题：

现在，我要删除 data [1] ，免费它，然后加入数组的其他2部分（ data [0] 和 [data2] ）并最终得到一个指向新数组的指针。

Problem :
Now, I want to delete data[1], free it, then join the other 2 parts of array (data[0] and [data2]) and finally get a pointer to the new array.

推荐答案

一种方法是：

One way to do it is:

int * newData = (int *) malloc(sizeof(int) * 2);

newData[0] = data[0];
newData[1] = data[2];

free( data );

data = newData;
newData = null;

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