c++ memcpy
时间: 2023-08-17 16:13:05 浏览: 113
在C++中,memcpy函数用于将源地址处的内容复制到目标地址,复制的字节数由参数count决定。memcpy的语法如下:
```cpp
memcpy(目标地址,源地址,字节数);
```
要使用memcpy函数,需要添加头文件#include <string.h>。\[2\]
下面是一个使用memcpy函数的示例代码:
```cpp
#include <iostream>
#include <string.h>
#define M 3
#define N 7
using namespace std;
int main(){
int a\[M\] = {0, 1, 2};
int b\[N\] = {0, 0, 0, 0, 0, 0, 0};
memcpy(b, a, sizeof(a));
int i;
for(i = 0; i < N; i++){
cout << b\[i\] << endl;
}
}
```
这段代码将数组a中的内容复制到数组b中,复制的字节数由sizeof(a)决定。然后通过循环打印数组b的元素,可以看到数组b中的元素已经被复制了。\[2\]
#### 引用[.reference_title]
- *1* *3* [c++中内存拷贝函数(C++ memcpy)详解](https://blog.csdn.net/sszgg2006/article/details/7989404)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [C++:memcpy的使用](https://blog.csdn.net/weixin_44652687/article/details/101829375)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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