'new char []'不起作用，但是应该

Question

I had the code, that returned char* If a write in cpp: 我有代码，该代码返回char *如果在cpp中写入：

char* test_char = new char[size];

all is good, but if i write in header: 一切都很好，但是如果我在标题中写：

char* test_char;

and in cpp: 在cpp中：

test_char = new char[size];

the program compiles but does not run. 该程序可以编译但无法运行。

What am I doing wrong? 我究竟做错了什么？

Answer 1

char = new char[size]; char =新的char [size];

You probably want 你可能想要

test_char = new char[size];

Answer 2

char = new char[size];

This should not even compile. 这甚至不应该编译。 You are missing a variable name: 您缺少变量名：

test_char = new char[size];

&#39;new char []&#39;不起作用，但是应该