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  • 自考新教材--p35

    源程序:

    #include <iostream>

    using namespace std;

    int main()

    {

    int a = 10;

    const int *p = &a;

    const int ca = 30;

    int *q;

    cout << "a的地址为: " << &a << " a的值为: " << a << endl;

    cout << "*p指向的地址为:" << p << " *p的值为: " << *p << endl;

    q = const_cast<int *>(p);  //去除p的常量性赋给q, 如果写p=q,则会报错

    *q = 20;

    cout << "a的地址为: " << &a << " a的值为: " << a << endl;

    cout << "*p指向的地址为: " << p<< " *p的值为: " << *p << endl;

    cout << "*q指向的地址为: " << q << " *p的值为: " << *q << endl;

    cout << "分界线" << endl;

    p = &ca;   //ca的值不能修改

    q = const_cast<int *>(p);  //去除p的常量性赋给q

    *q = 40;

    cout << "ca的地址为: " << &ca << " ca的值为: " << ca << endl;

    cout << "*p指向的地址为: " << p << " *p的值为: " << *p << endl;

    cout << "*q指向的地址为: " << q << " *p的值为: " << *q << endl;

    system("pause");

    return 0;

    }

    运行结果:

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  • 原文地址:https://www.cnblogs.com/duanqibo/p/11969251.html
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