您好，我是这个网站的新手，还是一个相当新手的编码人员，我正在研究一个课程的作业。我试图使用链接列表创建代码，并试图从另一个.cpp中调用要运行的函数。我可以编译到目前为止的内容，并且可以运行它，但是它将仅运行我在main中放置的内容，而不会单独运行任何内容。我只需要一些帮助，以弄清楚为什么我无法获取运行我正在调用的函数的代码。下面列出的是我的主要
#include"prog9.h"
#include<iostream>
#include<fstream>
#include<iomanip>
#include<cstdlib>
void createList();
void menu();
const int STUDENTS = 15;
int main()
{
student arr[STUDENTS];
std::ifstream(info);
info.open("prog9input.txt");
if(!info.is_open())
{
std::cout << "prog9input.txt failed to open" << endl;
system("PAUSE>NUL");
return 1;
}
for(int i = 0; i < STUDENTS ;i++)
{
info >> arr[i].studentID >> arr[i].name >> arr[i].number >> arr[i].strtName >> arr[i].strEnd
>> arr[i].gpa;
}
info.close();
student createList();
student menu();
}
下面是我的头文件
#ifndef PROG9_H_INCLUDED
#define PROG9_H_INCLUDED
#include<string>
using namespace std;
class student
{
public:
int studentID;
string name;
int number;
string strtName;
string strEnd;
float gpa;
protected:
struct Node
{
int studentID;
string name;
int number;
string strtName;
string strEnd;
float gpa;
Node *next;
};
Node *head;
void createList();
void menu();
void insertNode();
void deleteNode();
void displayList();
};
#endif // PROG9_H_INCLUDED
这是我用于功能的辅助.cpp。
#include"prog9.h"
#include<iomanip>
#include<iostream>
using namespace std;
//3. Delete the kth record from the middle of the sorted list and display the resulting list.
(Delete function.)
void student::createList()
{
int num = 15;
student arr[num];
Node *newNode;
Node *nodePtr;
Node *previousNode = nullptr;
for(int k = 0;k < num;k++)
{
newNode = new Node;
newNode->studentID = arr[k].studentID;
newNode->name = arr[k].name;
newNode->number = arr[k].number;
newNode->strtName = arr[k].strtName;
newNode->strEnd = arr[k].strEnd;
newNode->gpa = arr[k].gpa;
if(!head)
{
head = newNode;
newNode->next = nullptr;
}
else
{
nodePtr = head;
previousNode = nodePtr;
while(nodePtr != nullptr && nodePtr->studentID < arr[k].studentID)
{
previousNode = nodePtr;
nodePtr = nodePtr->next;
}
if(previousNode == nullptr)
{
head = newNode;
newNode->next = nodePtr;
}
}
}
}
void student::menu()
{
std::cout <<
"================================================================================================\n";
std::cout << "A)\tDisplay Sorted Student List\n";
std::cout << "B)\tDelete Student from list\n";
std::cout << "C)\tAdd new Student Record\n";
std::cout << "D)\tShow unsorted Student list\n";
std::cout << "E)\tEnd Program\n";
std::cout <<
"================================================================================================\n";
}
void student::deleteNode()
{
Node *nodePtr;
Node *previousNode;
int del;
int mth = 0;
int middle;
int student = 15;
std::cout << "what is the student ID of the student you wish to delete?: ";
std::cin >> del;
std::cout << "\n";
if (!head)
return;
if (head->studentID == del)
{
nodePtr = head->next;
delete head;
head = nodePtr;
middle = ( student / 2);
student--;
std::cout << "you have deleted a node ";
std::cout << (middle - 1) << " from the middle.\n";
student::displayList();
}
else
{
nodePtr = head;
while (nodePtr != nullptr && nodePtr->studentID != del)
{
mth++;
previousNode = nodePtr;
nodePtr = nodePtr->next;
}
if (nodePtr)
{
previousNode->next = nodePtr->next;
delete nodePtr;
std::cout << "you have deleted a node ";
std::cout << (middle - mth) << " from the middle.\n";
student::displayList();
}
}
}
void student::displayList()
{
Node *nodePtr;
nodePtr = head;
while (nodePtr)
{
std::cout << nodePtr->studentID << "\t";
std::cout << nodePtr->name << "\t";
std::cout << nodePtr->number << "\t";
std::cout << nodePtr->strtName << "\t";
std::cout << nodePtr->strEnd << "\t";
std::cout << nodePtr->gpa << "\t";
nodePtr = nodePtr->next;
}
}
void student::insertNode()
{
Node *newNode;
Node *nodePtr;
Node *previousNode = nullptr;
int IDnum,
hnum,
cnt,
student = 15,
middle = 0;
string name,
strtName,
strtend;
float gpa;
middle = (student / 2);
std::cout << "what is the student ID of the student you wish to add?: "; //
std::cin >> IDnum; //
std::cout << "\n\n"; //
//
std::cout << "what is the first name of the student you wish to add?: "; //
std::cin >> name; //
std::cout << "\n\n"; //
//
std::cout << "what is the house number of the student you wish to add?: "; //
std::cin >> hnum; //
std::cout << "\n\n"; //
//
std::cout << "what is the name of this students street in their street address?: "; //
std::cin >> strtName; //
std::cout << "\n\n"; //
//
std::cout << "what is the street end name of this student?(i.e. ave., st. ,blvrd. ect.): "; //
std::cin >> strtend; //
std::cout << "\n\n";
std::cout << "what is the students gpa?: ";
std::cin >> gpa;
std::cout << "\n\n";
newNode = new Node;
newNode->studentID = IDnum;
newNode->name = name;
newNode->number = hnum;
newNode->strtName = strtName;
newNode->strEnd = strtend;
newNode->gpa = gpa;
if(!head)
{
head = newNode;
newNode->next = nullptr;
std::cout << "you added a new node at " << middle - 1 << " from the middle.\n";
}
else
{
nodePtr = head;
previousNode = nodePtr;
while(nodePtr != nullptr && nodePtr->studentID < IDnum)
{
cnt++;
previousNode = nodePtr;
nodePtr = nodePtr->next;
}
if(previousNode == nullptr)
{
head = newNode;
newNode->next = nodePtr;
std::cout << "you added a new node at " << middle - cnt << " from the middle.\n";
}
}
}
请记住，我的代码尚未完成，所以我知道它可能会丢失一些东西，我只是因为无法正确运行我的功能而已。任何建议都会有所帮助！我没有错误代码，将运行main和来自main的cout，但是第二个cpp文件将什么也没有。