c++ - char* p="123"这句代码为什么是对的？

Question

如题，C风格字符串，"123"不是const char *类型的常量么？为什么赋给一个普通指针是可以的呢？

Answer 1

Although no error will be reported by doing this, trying to modify the string 123 pointed to by p will cause a memory access violation. Because "123" is a string constant, stored in a read-only storage area. The reason why const char* is required is to prevent programmers from mistakenly modifying 123.

Answer 2

Answers for Beginners
"123" is an object of const char type. const char * p should be read from right to left, which means that p is a pointer and the object pointed to is of type const char. This is not correct. What? In the same way, you are right to add p = "456"; at the end, as long as the object pointed to by p is const char.

Answer 3

Does

char *p = "123"; represent a character array? That is string

Answer 4

You will see a warning after compiling and adding -Wall.

 warning: ISO C++11 does not allow conversion from string literal to
      'char *' [-Wwritable-strings]
        char *p = "hello";
               ^

Answer 5

char *p = "123"; It is actually two processes. Allocate string space in the constant area, declare the character pointer p, and p points to the memory space where the string is located. If there is anything wrong, please correct me immediately

Answer 6

The pitfalls left by C language

Answer 7

This is left for compatibility with c