#include <iostream> using namespace std; class Savingsaccount { public: char id; float balance; char name; Savingsaccount(char _id,float _balance, char _name) { id = _id; balance = _balance; name = _name; } }; int main() { Savingsaccount s1("张三",10.00, "张文"); return 0; }优化代码

首先需要修改 Savingsaccount 类的构造函数参数类型，将 char 类型改为 string 类型，同时添加默认构造函数和成员函数来获取和设置私有成员变量。优化后的代码如下：

#include <iostream>
using namespace std;

class Savingsaccount {
private:
    string id;
    float balance;
    string name;
public:
    Savingsaccount() {}
    Savingsaccount(string _id, float _balance, string _name) {
        id = _id;
        balance = _balance;
        name = _name;
    }
    string getId() const {
        return id;
    }
    void setId(string _id) {
        id = _id;
    }
    float getBalance() const {
        return balance;
    }
    void setBalance(float _balance) {
        balance = _balance;
    }
    string getName() const {
        return name;
    }
    void setName(string _name) {
        name = _name;
    }
};

int main() {
    Savingsaccount s1("001", 10.00, "张三");
    cout << s1.getId() << " " << s1.getBalance() << " " << s1.getName() << endl;
    return 0;
}

这样做的好处是，代码更加规范、易读，同时也方便后续的扩展和维护。