请用c++代码 将string当作参数实现Cstring的GetBuffer 和 releaseBuffer方法
时间: 2024-03-08 08:47:31 浏览: 104
以下是使用 C++ 实现使用 string 当作参数的 CString 的 GetBuffer 和 ReleaseBuffer 方法的示例代码:
```c++
#include <iostream>
#include <string>
using namespace std;
class CString {
private:
char* buffer;
int length;
public:
CString() : buffer(nullptr), length(0) {}
~CString() { releaseBuffer(); }
char* GetBuffer(int newLength) {
releaseBuffer();
buffer = new char[newLength + 1];
length = newLength;
return buffer;
}
void ReleaseBuffer() {
if (buffer) {
buffer[length] = '\0';
length = strlen(buffer);
}
}
};
int main() {
string str = "Hello, world!";
CString cstr;
char* buffer = cstr.GetBuffer(str.length());
strcpy(buffer, str.c_str());
cstr.ReleaseBuffer();
cout << buffer << endl;
return 0;
}
```
注意:此示例代码仅用于演示如何使用 string 作为参数实现 CString 的 GetBuffer 和 ReleaseBuffer 方法。实际应用中,请使用标准的 CString 类或其他现有的字符串类库。
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