Question

class Student
{
private:
    string name;
    int year;
    string semester;
    int AmtClass;
    static string Year[4];

public:
    Student();
    Student(int AmtClass);
    Student(Student &);

    void setName(string name);
    void setYear(int year);
    void setSemester(string semester);
    void setAmtClass(int AmtClass);

    string getName();
    int getYear();
    string getSemester();
    int getAmtClass();

    ~Student()
        {
            if(AmtClass > 0)
                delete [] course;
        }
};

string Student::Year[4] = { "Freshman", "Sophomore", "Junior", "senior" };

Student::Student()
{
name = "";
year = 0;
semester = "";
AmtClass = 0;
}

Student::Student(int amount)
{
AmtClass = amount;

string *pName;
pName = new string[AmtClass];

for(int i = 0; i < AmtClass; i++)
{
    pName[i] = "";
}
}

跳过Accessors和Mutator函数......

void readStudentData(Student &);
void printStudentData(Student);

int main()
{
int amount;
cout << "How many courses are you currently taking? ";
cin >> amount;

Student kid;
kid.setAmtClass(amount);

readStudentData(kid);
}

void readStudentData(Student &kid)
{
cin.ignore(10000, '\n');

int amount = kid.getAmtClass();
string name = "";
string semester = "";
int year = 0;

cout << "What is your full name? ";
getline(cin,name);

cout << "\nHow many years have you been in college? ";
cin >> year;

cout << "\nWhat is your current semester? ";
getline(cin,semester);

Student kid1(amount);

cout << "Please enter the name of all your courses." << endl;
for(int i = 0; i < amount; i++)
{
    cout << "Course #" << i+1 << " : ";
    getline(cin,pName[i]);
}

}

在实现我的pName是构造函数中的局部变量之后，好了编辑了这个程序......我应该创建一个构造函数，它接收一个与学生正在学习的课程数相对应的整数参数。函数动态分配字符串数组的课程，并将每个元素设置为“”。然后我应该用它来记录学生所选课程的名称。

Answer 1

Year数组应该只分配给amount，就是这样：

Student::Student(int amount)
    : Year(new std::string[amount]()), AmtClass(amount)
{
}

您也可以使用std::vector，这样您就不必自己处理删除内存：

class Student
{
    std::vector<std::string> Year;
    // ...
};

Student::Student(int amount)
    : Year(amount), AmtClass(Year.size())
{
}

本地化我的构造函数

1 个答案: