c++ - 堆还是栈？当在 C++ 中的函数调用中引用常量字符串时

Question

考虑函数:

char *func()
{
    return "Some thing";
}

常量 string (char array) "Some thing" 是存储在堆栈中作为函数调用的局部变量还是全局变量堆？

我猜测它在堆中。

如果多次调用该函数，内存中有多少份"Some thing"？ (它是堆还是堆栈？)

Answer 1

字符串文字“Some thing”的类型为const char*。因此，它们既不在堆上也不在堆栈上，而是在一个只读位置，这是一个实现细节。

来自 Wikipedia

Data

The data area contains global and static variables used by the program that are initialized. This segment can be further classified into initialized read-only area and initialized read-write area. For instance the string defined by char s[] = "hello world" in C and a C statement like int debug=1 outside the "main" would be stored in initialized read-write area. And a C statement like const char* string = "hello world" makes the string literal "hello world" to be stored in initialized read-only area and the character pointer variable string in initialized read-write area. Ex: static int i = 10 will be stored in data segment and global int i = 10 will be stored in data segment