需要帮助修复“未定义的引用”错误

Question

我有这个项目，我必须在其中创建一个类，并使用getter和setter来打印信息。

到目前为止，这是我的代码：

我的主：

//Main program

#include <iostream>
#include <string>
#include "studentType.h"

using namespace std;

int main()
{
    studentType student;
    studentType newStudent("Brain", "Johnson", '*', 85, 95, 3.89);

    student.print();
    cout << "***************" << endl << endl;

    newStudent.print();
    cout << "***************" << endl << endl;

    return 0;
}

我的studentType.h文件：

#include <iostream>
#include <string>

using namespace std;

class studentType{

    public:
    //member functions - accessor 
    string getFirstName();
    string getLastName();
    char getGrade();
    int getTestScore();    
    int getProgScore();
    double getGPA();

    //member function - mutators
    void setFirstName(string);
    void setLastName(string);
    char setGrade();
    void setTestScore(int);
    void setProgScore(int);
    void setGPA(double);

    //print function
    void print();

    //constructor
    studentType(string, string, char, int, int, double);
    studentType() {}

    private:
    string firstName = "";
    string lastName = "";   
    char courseGrade = ' ';
    int testScore = 0;
    int programmingScore = 0;
    double gpa = 0.00;
}; //end of declaration

***还有我更新的studentTypeImp.cpp代码：

#include <iostream>
#include <string>
#include "studentType.h"

using namespace std;

studentType::studentType(string s, string t, char a, int x, int y, double z){
    firstName = s;
    lastName = t;
    courseGrade = a;
    testScore = x;
    programmingScore = y;
    gpa = z;
}
void studentType::setFirstName(string first){
    firstName = first;
}

void studentType::setLastName(string last){
    lastName = last;
}

string studentType::getFirstName(){
    return firstName;
}

string studentType::getLastName(){
    return lastName;
}

char studentType::getGrade(){
    return courseGrade;
}

void studentType::setTestScore(int y){
    testScore = y;
}

int studentType::getTestScore(){
    return testScore;
}

void studentType::setProgScore(int a){
    programmingScore = a;
}

int studentType::getProgScore(){
    return programmingScore;
}

void studentType::setGPA(double n){
    gpa = n;
}

double studentType::getGPA(){
    return gpa;
}

void studentType::print(){

    cout << "Name: " << firstName << " " << lastName << endl;
    cout << "Grade: " << courseGrade << endl;
    cout << "Test score: " << testScore << endl; 
    cout << "Programming score: " << programmingScore << endl;
    cout << "GPA: " << gpa << endl;
}

运行代码时，我获得了对错误的未定义引用

In function `main':
main.cpp:(.text+0xbf): undefined reference to `studentType::studentType(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, char, int, int, double)'
collect2: error: ld returned 1 exit status
/bin/bash: line 4: ./a.out: No such file or directory

我对编码还很陌生，任何帮助都会很棒！

新错误消息：

Build Status
     Build Failed
Build Output
     /root/sandbox79bdc12a/nt-test-580dc59a.cpp: In member function 'virtual void setAndGetGrade_1_Test::TestBody()':
    /root/sandbox79bdc12a/nt-test-580dc59a.cpp:7:22: error: no matching function for call to 'studentType::setGrade()'
     student.setGrade();
                      ^
In file included from /root/sandbox79bdc12a/nt-test-580dc59a.cpp:2:0:
/root/sandbox79bdc12a/studentTypeImp.cpp:32:6: note: candidate: void studentType::setGrade(char)
 void studentType::setGrade(char p){
      ^~~~~~~~~~~
/root/sandbox79bdc12a/studentTypeImp.cpp:32:6: note:   candidate expects 1 argument, 0 provided
make[2]: *** [CMakeFiles/runTests.dir/nt-test-580dc59a.cpp.o] Error 1
make[1]: *** [CMakeFiles/runTests.dir/all] Error 2
make: *** [all] Error 2