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Light-City avatar Light-City commented on May 19, 2024

看博客里写的是(包括例子的说明),常指针指向的对象的值不能变,可以通过非 常指针来修改。

这个说法似乎不太对,应该是常指针指向的对象不能变,即不能先指向a,又指向b。但是是可以直接修改指向变量的值的(只要这个变量不是const)。我这段代码实验了一下,正常运行:

        int d = 2;
        int e = 3;
        int * const ptr3 = &d;

        //ptr3 = &e;//非法
        std::cout << *ptr3 << std::endl;
        *ptr3 = 4;
        std::cout << *ptr3 << std::endl;

不知道是不是这么个情况

是你说的这个样子

from cplusplusthings.

Light-City avatar Light-City commented on May 19, 2024

看博客里写的是(包括例子的说明),常指针指向的对象的值不能变,可以通过非 常指针来修改。
这个说法似乎不太对,应该是常指针指向的对象不能变,即不能先指向a,又指向b。但是是可以直接修改指向变量的值的(只要这个变量不是const)。我这段代码实验了一下,正常运行:

        int d = 2;
        int e = 3;
        int * const ptr3 = &d;

        //ptr3 = &e;//非法
        std::cout << *ptr3 << std::endl;
        *ptr3 = 4;
        std::cout << *ptr3 << std::endl;

不知道是不是这么个情况

是你说的这个样子

好像例子中是有对应代码的~

from cplusplusthings.

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