所以第一次发帖和真正的初学者，所以希望这样做，但真的需要帮助这个程序。
谢谢大家的帮助，我做了一些修改，但这些错误消失了，但现在我得到了这些：
错误5错误LNK2019：未解析的外部符号“void __cdecl searchID（struct StudentRecord *，int）”（？searchID @@ YAXPAUStudentRecord @@ H @ Z）在函数_main中引用
错误6错误LNK2019：未解析的外部符号“void __cdecl sortRecordsByName（struct StudentRecord *，int）”（？sortRecordsByName @@ YAXPAUStudentRecord @@ H @ Z）在函数_main中引用
错误7错误LNK2019：未解析的外部符号“void __cdecl getInformation（struct StudentRecord * const，int）”（？getInformation @@ YAXQAUStudentRecord @@ H @ Z）在函数_main中引用
错误8错误LNK1120：3个未解析的外部
以下是修订后的代码：
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
const int MAX_SIZE = 20;
struct Answers
{
char answer1;
char answer2;
char answer3;
char answer4;
char answer5;
};
struct StudentRecord
{
int ID;
char student_name[MAX_SIZE];
Answers answer;
double score;
double average;
char letter_grade;
};
void getInformation(StudentRecord student[], int&);
void enterKey(char[]);
void calculateAvgAndLetter(StudentRecord *student, int, char[]);
void sortRecordsByName(StudentRecord * student, int);
void displayResults(StudentRecord * student, int);
bool displayReport(StudentRecord * student, int);
void searchID(StudentRecord * student, int);
int main()
{
int search;
int ID = 0;
bool check = false;
char repeat = 'y';
const int MAX_STUDENTS = 10;
int number_of_students = 0;
char key[5];
do {
cout << "How many students: ";
cin >> number_of_students;
StudentRecord student[MAX_STUDENTS];
enterKey(key);
getInformation(student,number_of_students);
calculateAvgAndLetter(student, number_of_students, key);
sortRecordsByName(student, number_of_students);
displayResults(student, number_of_students);
cout << "Would you like to search for a student (y for yes and n for no)?: ";
cin >> search;
while (search != 'n' && search != 'y')
{
cout << "Wrong ID" << endl;
cout << "Would you like to search for another student (y for yes and n for no)?: ";
cin >> search;
}
if (search == 'y')
{
searchID(student, number_of_students);
check = true;
}
else
check = false;
while (check)
{
cout << "Would you like to search for another student (y for yes and n for no)?: ";
cin >> search;
while (search != 'n' && search != 'y')
{
cout << "Wrong ID" << endl;
cout << "Would you like to search for another student (y for yes and n for no)?: ";
cin >> search;
}
if (search == 'y')
{
searchID(student, number_of_students);
check = true;
}
else
check = false;
}
cout << "Would you like to process another group of students(y for yes and n for no)?: " << endl;
cin >> repeat;
} while (repeat == 'y');
return 0;
}
void enterKey(char key[5])
{
for (int i = 0; i < 6; i++) {
cout << "Please enter the answer to question " << i + 1 << ": ";
cin >> key[i]; }
}
void getInformation(StudentRecord *student[],int number_of_students)
{
int max_students;
char again;
int i = 0;
cout << "Would you like to enter student information? " << endl;
cin >> again;
if (again == 'Y' || again == 'y')
{
do
{
cout << "Please enter student " << i + 1 << " information:" << endl;
cout << "Please Enter Student Name Last name first with no spaces: " << endl;
cin >> student[i]->student_name;
cout << "Please Enter Student Id Number: " << endl;
cin >> student[i]->ID;
cout << "Please enter the student's answer to question 1: ";
cin >> student[i]->answer.answer1;
cout << "Please enter the student's answer to question 2: ";
cin >> student[i]->answer.answer2;
cout << "Please enter the student's answer to question 3: ";
cin >> student[i]->answer.answer3;
cout << "Please enter the student's answer to question 4: ";
cin >> student[i]->answer.answer4;
cout << "Please enter the student's answer to question 5: ";
cin >> student[i]->answer.answer5;
i++;
if (i < number_of_students) {
cout << "Would you like to enter student information? " << endl;
cin >> again;
}
else again='n';
}
while(again == 'y' || again == 'Y');
cout<<"Reports:"<<endl;
}
}
void sortByID(StudentRecord student[], int number_of_students)
{
bool swap = true;
int j = 0;
int temp;
while (swap)
{
swap = false;
j++;
for (int i = 0; i < number_of_students - j; i++)
{
if (student[i].ID > student[i + 1].ID)
{
temp = student[i].ID;
student[i].ID = student[i + 1].ID;
student[i + 1].ID = temp;
swap = true;
}
}
}
}
int LinearSearch(StudentRecord student[], int number_of_students, int ID, int first, int last)
{
int i = 0;
int position;
for (int i = 0; i < number_of_students; i++)
{
if (ID == student[i].ID) {
position = i; }
}
return position;
}
void SortRecordsByName(StudentRecord student[], int number_of_students)
{
bool swap = true;
int j = 0;
StudentRecord temp;
while (swap)
{
swap = false;
j++;
for (int i = 0; i < number_of_students - j; i++)
{
if (student[i].student_name > student[i + 1].student_name)
{
strcpy(temp.student_name,student[i].student_name);
strcpy(student[i].student_name,student[i + 1].student_name);
strcpy(student[i + 1].student_name,temp.student_name);
swap = true;
}
}
}
}
void calculateAvgAndLetter(StudentRecord student[], int number_of_students, char key[5])
{
int points1;
int points2;
int points3;
int points4;
int points5;
int i = 0;
int j = 0;
for (int i = 0; i < number_of_students; i++)
{
if (student[i].answer.answer1 == key[0])
points1 = 10;
else
points1 = 0;
if (student[i].answer.answer2 == key[1])
points2 = 10;
else
points2 = 0;
if (student[i].answer.answer3 == key[2])
points3 = 10;
else
points3=0;
if (student[i].answer.answer4 == key[3])
points4 = 10;
else
points4 = 0;
if (student[i].answer.answer5 == key[4])
points5 = 10;
else
points5 = 0;
student[i].score= points1 + points2 + points3 + points4 + points5;
student[i].average = student[i].score * 2 ;
if((student[i].average >= 90) && (student[i].average <= 100))
student[i].letter_grade='A';
else if ((student[i].average >= 80) &&(student[i].average <= 89))
student[i].letter_grade='B';
else if ((student[i].average >= 70) && (student[i].average <= 79))
student[i].letter_grade='C';
else if ((student[i].average >= 60) && (student[i].average <= 69))
student[i].letter_grade='D';
else if ((student[i].average >= 0) && (student[i].average <= 59))
student[i].letter_grade='F'; }
}
void displayResults(StudentRecord student[], int number_of_students)
{
cout << fixed<< setprecision(2);
cout << "Student ID" << setw(10) << "StudentName" << setw(10) << "Answers" << setw(10) <<"Total Pts" << setw(10) << "Average" << setw(12) << "Letter Grade"<<endl;
cout << setfill('-');
cout << setw(50) << "-" << endl;
cout << setfill(' ');
for (int i = 0; i < number_of_students; i++)
cout << setw(3) << student[i].ID << setw(15) << student[i].student_name << setw(10) << student[i].answer.answer1 << student[i].answer.answer2 << student[i].answer.answer3 << student[i].answer.answer4
<< student[i].answer.answer5 << setw(9) << student[i].score << setw(10) << student[i].average << setw(13) << student[i].letter_grade << endl;
cout <<"\n\n\nStudents admitted to graduate program: \n" << endl;
cout << fixed<< setprecision(2);
cout << "Student ID" << setw(10) << "StudentName" << setw(10) <<"Total Pts" << setw(10) << "Average" << setw(12) << "Letter Grade"<<endl;
cout << setfill('-');
cout << setw(40) << "-" << endl;
cout << setfill(' ');
for (int i = 0; i < number_of_students; i++)
{
if (student[i].letter_grade == 'A' || student[i].letter_grade == 'B') {
cout << setw(2) << student[i].ID << setw(12) << student[i].student_name << setw(10) << student[i].score
<< setw(10) << student[i].average << setw(10) << student[i].letter_grade << endl; }
}
cout <<"\n\n\nStudents with Conditional Admission to Graduate Program: \n" << endl;
cout << fixed<< setprecision(2);
cout << "Student ID" << setw(10) << "StudentName" << setw(10) <<"Total Pts" << setw(10) << "Average" << setw(12) << "Letter Grade"<<endl;
cout << setfill('-');
cout << setw(40) << "-" << endl;
cout << setfill(' ');
for (int i = 0; i < number_of_students; i++)
{
if (student[i].letter_grade == 'C') {
cout << setw(2) << student[i].ID << setw(10) << student[i].student_name << setw(10) << student[i].score
<< setw(10) << student[i].average << setw(10) << student[i].letter_grade << endl; }
}
cout <<"\n\n\nStudents Not Allowed Admission: \n" << endl;
cout << fixed<< setprecision(2);
cout << "Student ID" << setw(10) << "StudentName" << setw(10) <<"Total Pts" << setw(10) << "Average" << setw(12) << "Letter Grade"<<endl;
cout << setfill('-');
cout << setw(40) << "-" << endl;
cout << setfill(' ');
for (int i = 0; i < number_of_students; i++)
{
if (student[i].letter_grade == 'D' || student[i].letter_grade == 'F') {
cout << setw(2) << student[i].ID << setw(10) << student[i].student_name << setw(10) << student[i].score
<< setw(10) << student[i].average << setw(10) << student[i].letter_grade << endl; }
}
}
void searchIDandDisplay(StudentRecord student[], int number_of_students, int ID)
{
bool check = true;
string acceptence;
cout << "\n\n\nEnter the ID of the student: ";
cin >> ID;
while (check)
{
for(int i = 0; i < number_of_students; i++)
{
if (ID == student[i].ID)
{
check = false;
}
}
if (check == true)
{
cout << "No student with this ID" << endl;
cin >> ID;
}
}
int i = LinearSearch(student, number_of_students, ID, student[0].ID, student[number_of_students].ID);
if (student[i].letter_grade == 'A' || student[i].letter_grade == 'B' || student[i].letter_grade == 'C') {
acceptence = "Accepted"; }
else
acceptence = "Denied";
cout << fixed << setprecision(2);
cout << "Student ID" << setw(10)
<< "StudentName"
<< setw(10) << setw(10)
<<"Total Pts" << setw(10)
<< "Average" << setw(10)
<< "Letter Grade"
<< "Status" << endl;
cout << setfill('-');
cout << setw(48) << "-" << endl;
cout << setfill(' ');
cout << setw(2) << student[i].ID
<< setw(10) << student[i].student_name
<< setw(10) << student[i].score
<< setw(10) << student[i].average
<< setw(10) << student[i].letter_grade
<< setw(10) << acceptence <<endl;
}
就像我说一个真正的初学者所以任何帮助将不胜感激，并希望我发布正确，抱歉，如果有什么不对。再次感谢大家的帮助！
答案 0 :(得分：0)
void getInformation（StudentRecord * student []，int＆amp; num_std）;
这表示getInformation获取了一系列指向StudentRecord的指针。你只想
void getInformation（StudentRecord student []，int＆amp; num_std）;
带有一系列StudentRecords。
答案 1 :(得分：0)
void getInformation(StudentRecord *student[], int& num_std);
在此声明中，student被视为指向StudentRecord的指针。将其更改为：
void getInformation(StudentRecord *student, int& num_std);
或
void getInformation(StudentRecord student[], int& num_std);
答案 2 :(得分：0)
问题在于这一行
getInformation(student,number_of_students);
此处student的类型为StudentRecord[]，但getInforamtion的参数键入StudentRecord[]*。为了使类型排成一行，您需要将参数类型更改为StudentRecord*或传递student的地址。
鉴于您将大小与值集合一起传递，我倾向于将getInformation的签名更改为
void getInformation(StudentRecord *student, int& num_std);
答案 3 :(得分：0)
一些评论
int search;
int ID = 0;
bool check = false;
char repeat = 'y';
const int MAX_STUDENTS = 5;
int number_of_students = 0;
char key[5];
do {
cout << "How many students: ";
cin >> number_of_students;
在继续
之前，您应该先检查if (number_of_students < MAX_STUDENTS)
你的数组键的维度为5，但在你的for循环中，你从0..5开始是6，最好还是将维度作为函数enterKey(char *key, int maxsize) { ... }的参数
void enterKey(char key[5]) -> (char* key, int maxsize)
{
for (int i = 0; i < 6; i++) -> for (int i=0; i<maxsize; ++i)
{
cout << "Please enter the answer to question " << i + 1 << ": ";
cin >> key[i];
}
}
形式参数指定StudentRecord 指针数组
void getInformation(StudentRecord *student[],int number_of_students)
但你没有以这种方式提供：
StudentRecord student[MAX_STUDENTS];
enterKey(key);
getInformation(student,number_of_students);
如果您按上述方式编写，则student是一个StudentRecords数组
相反，您应该将原型更改为这样（记住数组衰减为ptr）：
void getInformation(StudentRecord *student,int number_of_students)
另一个提示
你的struct Answers有5个答案字符answer1，answer2，..将它作为一个数组更方便，那么你可以缩短你输入答案的方式
答案 4 :(得分：0)
您的原型不需要其参数的名称。他们只需要数据类型。
void getInformation(StudentRecord*, int&);
void enterKey(char[]);
void calculateAvgAndLetter(StudentRecord*, int, char[]);
void sortRecordsByName(StudentRecord*, int);
void displayResults(StudentRecord*, int);
bool displayReport(StudentRecord*, int);
void searchID(StudentRecord*, int);
getInformation的原型：
void getInformation(StudentRecord *student[], int& num_std);
将其第二个参数键入为int＆amp;，而您的定义为：
void getInformation(StudentRecord *student[],int number_of_students)
缺少＆amp ;.在这种情况下，您可以删除＆amp;从原型或将其添加到定义中，您当前的实现应该是相同的。
正如其他人所说，你夸大了第一个参数。尝试删除[]或*（无论如何总是通过引用传递数组）。