[C++] 指针的类型与指针所指向的类型

1 int *ptr;     //指针的类型是 int*
2 char *ptr;    //指针的类型是 char*
3 int **ptr;    //指针的类型是 int**
4 int (*ptr)[3];  //指针的类型是 int(*)[3]
5 int *(*ptr)[4];   //指针的类型是 int*(*)[4]

1 int *ptr;     //指针所指向的类型是 int
2 char *ptr;    //指针所指向的的类型是 char
3 int **ptr;    //指针所指向的的类型是 int*
4 int (*ptr)[3];  //指针所指向的的类型是 int()[3]
5 int *(*ptr)[4];   //指针所指向的的类型是 int*()[4]

1 int *p[3];
2 for (int i = 0; i < 3; i++)
3 {
4   p[i] = i;
5 }

1 int *p[3];
2 for (int i = 0; i < 3; i++)
3 {
4   p[i] = new int(i);
5 }

1 int (*p)[3];
2 p = new int[][3];
3 for (int i = 0; i < 3; i++)
4 {
5   (*p)[i] = i;
6 }