CPP46. 多态实现计算器功能
描述
完善下面的代码，使程序能够正常运行。要求 BaseCalculator 类中提供 getResult() 函数（无需实现），在 AddCalculator 类中实现两个成员相加（m_A + m_B），在 SubCalculator 类中实现两个成员相减（m_A - m_B）输入描述
无输出描述
程序已经给定输出C++ 解法, 执行用时: 2ms, 内存消耗: 272KB, 提交时间: 2022-04-14
#include <iostream>
using namespace std;
class BaseCalculator {
public:
int m_A;
int m_B;
// write your code here......
public:
virtual int getResult();
};
// 加法计算器类
class AddCalculator : public BaseCalculator {
// write your code here......
virtual int getResult()
{
return m_A+m_B;
}
};
// 减法计算器类
class SubCalculator : public BaseCalculator {
// write your code here......
virtual int getResult()
{
return m_A-m_B;
}
};
int main() {
BaseCalculator* cal = new AddCalculator;
cal->m_A = 10;
cal->m_B = 20;
cout << cal->getResult() << endl;
delete cal;
cal = new SubCalculator;
cal->m_A = 20;
cal->m_B = 10;
cout << cal->getResult() << endl;
delete cal;
return 0;
}
C++ 解法, 执行用时: 2ms, 内存消耗: 272KB, 提交时间: 2021-11-07
#include <iostream>
using namespace std;
class BaseCalculator {
public:
int m_A;
int m_B;
// write your code here......
virtual int getResult();
};
// 加法计算器类
class AddCalculator : public BaseCalculator {
// write your code here......
virtual int getResult()
{
return m_A + m_B;
}
};
// 减法计算器类
class SubCalculator : public BaseCalculator {
// write your code here......
virtual int getResult()
{
return m_A - m_B;
}
};
int main() {
BaseCalculator* cal = new AddCalculator;
cal->m_A = 10;
cal->m_B = 20;
cout << cal->getResult() << endl;
delete cal;
cal = new SubCalculator;
cal->m_A = 20;
cal->m_B = 10;
cout << cal->getResult() << endl;
delete cal;
return 0;
}
C++ 解法, 执行用时: 2ms, 内存消耗: 276KB, 提交时间: 2022-08-07
#include <iostream>
using namespace std;
class BaseCalculator {
public:
int m_A;
int m_B;
// write your code here......
virtual int getResult() = 0;
};
// 加法计算器类
class AddCalculator : public BaseCalculator {
// write your code here......
int getResult()
{
return this->m_A + this->m_B;
}
};
// 减法计算器类
class SubCalculator : public BaseCalculator {
// write your code here......
int getResult()
{
return this->m_A - this->m_B;
}
};
int main() {
BaseCalculator* cal = new AddCalculator;
cal->m_A = 10;
cal->m_B = 20;
cout << cal->getResult() << endl;
delete cal;
cal = new SubCalculator;
cal->m_A = 20;
cal->m_B = 10;
cout << cal->getResult() << endl;
delete cal;
return 0;
}
C++ 解法, 执行用时: 2ms, 内存消耗: 276KB, 提交时间: 2022-05-17
#include <iostream>
using namespace std;
class BaseCalculator {
public:
int m_A;
int m_B;
// write your code here......
//多态实现计算器功能
virtual int getResult();
};
// 加法计算器类
class AddCalculator : public BaseCalculator {
// write your code here......
//重载getResult方法，实现功能
virtual int getResult()
{
return m_A+m_B;
}
};
// 减法计算器类
class SubCalculator : public BaseCalculator {
// write your code here......
virtual int getResult()
{
return m_A-m_B;
}
};
int main() {
BaseCalculator* cal = new AddCalculator;
cal->m_A = 10;
cal->m_B = 20;
cout << cal->getResult() << endl;
delete cal;
cal = new SubCalculator;
cal->m_A = 20;
cal->m_B = 10;
cout << cal->getResult() << endl;
delete cal;
return 0;
}
C++ 解法, 执行用时: 2ms, 内存消耗: 276KB, 提交时间: 2022-04-02
#include <iostream>
using namespace std;
class BaseCalculator {
public:
int m_A;
int m_B;
// write your code here......
virtual int getResult()
{
return 0;
}
};
// 加法计算器类
class AddCalculator : public BaseCalculator {
// write your code here......
public :
int getResult()
{
return m_A + m_B;
}
};
// 减法计算器类
class SubCalculator : public BaseCalculator {
// write your code here......
public:
int getResult()
{
return m_A - m_B;
}
};
int main() {
BaseCalculator* cal = new AddCalculator;
cal->m_A = 10;
cal->m_B = 20;
cout << cal->getResult() << endl;
delete cal;
cal = new SubCalculator;
cal->m_A = 20;
cal->m_B = 10;
cout << cal->getResult() << endl;
delete cal;
return 0;
}