Question

首先发布在这里。我正在创建一个按字母顺序对数组进行排序的程序，并显示未排序和排序的列表。但是，当通过Lab5.cpp测试排序函数时，它声明在标头中声明的数组指针和实现.cpp是未声明的，尽管原型匹配实际的函数调用。我发布了一个mediafire链接，如果需要，我可以发布文本。

http://www.mediafire.com/?39xfxm3canjndte

//Lab 5.cpp
#include <iostream>
#include <string>
#include <iomanip>
#include "Student.h"
using namespace std;

int main()
{
    Student stu;

    stu.getStudent();  
    stu.displayStudent();
    stu.sortStudent(string *nameArray[], int *ageArray[]);
    system("pause");
};


//Student.h
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;

class Student
{
      public:
             Student();
             void setStudent();
             int getStudent();
             int sortStudent(string *nameArray[], int *ageArray[]);
             void displayStudent();
             void displaySorted(string *nameArray[], int *ageArray);
      private:
             string names[50];
             int age[50];
             int size;
};        


//Student.cpp
using namespace std;
#include <iostream>
#include <string>
#include "Student.h"

Student::Student()
{
                  setStudent();
};

void Student::setStudent()
{
    for(int i = 0; i <= size; i++)
    {
            age[i] = 0;
    }
};    

int Student::getStudent()
{
    string temp;
    cout << "Enter number of people <0 . . 50>" << endl << "> ";
    cin >> size;
    getline( cin, temp);
    for(int i = 1; i <= size; i++)
    {
            cout << "Enter name " << i << " (lastname, firstname): ";
            getline( cin, names[i] );
            cout << "Enter age " << i << ": ";
            cin >> age[i];
            cout << endl;
            getline( cin, temp );
    }
};

int Student::sortStudent(string *nameArray[], int *ageArray[])
{
            *nameArray[i] = &name[i];
            *ageArray[i] = &age[i];


};

void Student::displayStudent()
{
    cout << "Original list" << endl;
    cout << "------------------------" << endl;
    for(int i = 1; i <= size; i++)
    {
            cout << names[i] << setw(28) << age[i] << endl;
    }
};

void Student::displaySorted(string *nameArray[], int *ageArray)
{

};

Answer 1

我认为您需要实现所需的sortStudent方法和displayStudent方法。

好的，让我们从

开始

  1.  Tagging this as homework and c++
  2.  Give a print out of the error
    ~/Desktop/test/Student$ make
        g++ -c Student.cpp -o Student.o -I.  
        g++ -c Lab5.cpp -o Lab5.o -I.  
        Lab5.cpp: In function ‘int main()’:
        Lab5.cpp:14: error: expected primary-expression before ‘*’ token
        Lab5.cpp:14: error: ‘nameArray’ was not declared in this scope
        Lab5.cpp:14: error: expected primary-expression before ‘]’ token
        Lab5.cpp:14: error: expected primary-expression before ‘int’
        Lab5.cpp:15: error: ‘system’ was not declared in this scope
        make: *** [Lab5.o] Error 1
  3. Explain what you have tried, and what you are trying to do.

在我看来，你要实现这些方法： int sortStudent（string * nameArray []，int * ageArray []）; void displaySorted（string * nameArray []，int * ageArray）;

这会让某人快速指出错误并得到你在你的路上。我相信错误是由于您需要更换 main()函数中的函数存根，具有有效的函数调用。也，如果这已被标记为c或c++，那么它可能会被评为关。所以，最后，希望这有助于阅读SO FAQ。

在我的main.cpp中，通过对象声明调用函数变量，它是未声明的

1 个答案: