Pointers C++

Pointer to const 常量指针

int a = 10;
int b = 5;
const int *p = &a;
p = &b; //✅
// ilegal🚫: *p = b;

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Const pointer 指针常量

int a = 10;
int b = 5;
int * const p = &a;
*p = 2; //✅
*p = b; //✅
// ilegal🚫: p = &b;

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Const pointer to const

int a = 10;
int b = 5;
const int * const p = &a;
// ilegal🚫: *p = 2;
// ilegal🚫: *p = b;
// ilegal🚫: p = &b;

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