c++ - 初始化无符号字符的正确方法*

Question

初始化 unsigned char* 的正确方法是什么？我目前正在这样做:

unsigned char* tempBuffer;
tempBuffer = "";

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或者我应该使用 memset(tempBuffer, 0, sizeof(tempBuffer)); 吗？

Answer 1

要“正确”初始化一个指针(unsigned char * 如您的示例所示)，您只需做一个简单的操作

unsigned char *tempBuffer = NULL;

如果要初始化 unsigned char 的数组s，您可以执行以下任一操作:

unsigned char *tempBuffer = new unsigned char[1024]();
// and do not forget to delete it later
delete[] tempBuffer;

或

unsigned char tempBuffer[1024] = {};

我还建议查看 std::vector<unsigned char> ，你可以这样初始化:

std::vector<unsigned char> tempBuffer(1024, 0);