c++ - C++中 vector 上的未初始化局部变量错误

Question

我正在努力完成我的 C++ 类(class)的作业，但我遇到了一个问题，到目前为止我还没有找到答案。

我想做的是创建一个可以无限增长直到用户打破循环的 vector 。该 vector 必须包含类对象以包含学生姓名和成绩信息。我正在上课；在这一点上，程序中唯一给我带来麻烦的部分就是 vector 。

我不断收到此错误代码:

error C4700: uninitialized local variable 'students' used

这是我的功能:

void vectorfctn(){
   vector<student> *students; //I'm assuming this is what is causing the error
   string stud;
   double ex1;
   double ex2;
   double hw;
   double fex;
   char exit;

   do {
    cout << "Enter Student Name" << endl; cin >> stud;
    cout << endl << "Enter First Exam" << endl; cin >> ex1;
    cout << endl << "Enter Second Exam" << endl; cin >> ex2;
    cout << endl << "Enter Homework" << endl; cin >> hw;
    cout << endl << "Enter Final" << endl; cin >> fex;

    student* s1 = new student(stud, ex1, ex2, hw, fex);
    s1->calcFinalGrade();
    students->push_back(*s1); //This is the line referenced by visual studio in the error

    cout << "Would you like to continue? y or n" << endl;
    cin >> exit;
    delete s1;
   } while (exit != 'n');

for (size_t i = 0; i < students->size(); i++) {
    cout << students->at(i).calcFinalGrade() << endl;
}
};

如何在不限制大小的情况下初始化 vector ？我很讨厌 vector ，也不太了解它们，所以任何建议都将不胜感激。

Answer 1

students vector 不需要是指针。
替换 vector<student> *students;与 vector<student> students;

和

students->pushback()至 students.pushback()