c++ - 函数C++中未使用参数

我正在制作一个程序，该程序将从文件读取并在屏幕和文件中输出数据。在添加总体平均和总计数之前，我已经使它工作了，但是现在它崩溃了，编译过程中没有错误。

我已经搜索了类似的线程，但是找不到任何可帮助我修复这些错误的内容。任何帮助表示赞赏。

编辑：更新了代码，并建议了一些更改。现在只是崩溃瓦特/没有错误。

                          #include <iostream>
            #include <string>
            #include <limits>
            #include <cmath>
            #include <iomanip>
            #include <fstream>

            using namespace std;

            void gradeCalc(int studentID, int count, double midterm, double finalExam, double researchPaper, double groupProject, double participation, double studentAvg, double& overallAvg, double gradeSum);
            void printGrade(int studentID, int count, double midterm, double finalExam, double researchPaper, double groupProject, double participation, double studentAvg, double& overallAvg, double gradeSum);

            int main()
            {
                int studentID;
                int count = 0;

                double midterm;
                double finalExam;
                double researchPaper;
                double groupProject;
                double participation;
                double studentAvg;
                double overallAvg;
                double gradeSum;

                gradeCalc(studentID, count, midterm, finalExam, researchPaper, groupProject, participation, studentAvg, overallAvg, gradeSum);
                printGrade(studentID, count, midterm, finalExam, researchPaper, groupProject, participation, studentAvg, overallAvg, gradeSum);

                return 0;
            }

            void printGrade(int studentID, int count, double midterm, double finalExam, double researchPaper, double groupProject, double participation, double studentAvg, double& overallAvg, double gradeSum)
            {

                ifstream infile;
                ofstream outfile;

                infile.open("grades.dat");
                outfile.open("grades.txt");
                outfile << "STUDENT GRADING REPORT: ";
                outfile << fixed << showpoint << setprecision(2);

                while (!infile.eof()) {

                    infile >> studentID >> midterm >> finalExam >> researchPaper >> groupProject >> participation;

                    if (studentID > 1 && studentID <= 999) {

                        outfile << endl
                                << "Student ID: " << studentID << ' ' << "Midterm: " << midterm << ' ' << "Final Exam: " << finalExam << ' ' << "Research Paper: " << researchPaper << ' ' << "Group Project: " << groupProject
                                << "Participation: " << participation << ' ' << "Student Average: " << studentAvg;
                    }
                    overallAvg = gradeSum / count;
                    outfile << endl
                            << "Total # of Students: " << count
                            << "Overall Class Average: " << overallAvg;
                }

                infile.close();
                outfile.close();
            };

            void gradeCalc(int studentID, int count, double midterm, double finalExam, double researchPaper, double groupProject, double participation, double studentAvg, double& overallAvg, double gradeSum)
            {

                //midterm = .25
                //finalExam = .25
                //researchPaper = .20
                //groupProject = .20
                //participation = .10

                ifstream infile;
                ofstream outfile;

                infile.open("grades.dat");

                while (!infile.eof()) {

                    infile >> studentID >> midterm >> finalExam >> researchPaper >> groupProject >> participation;
                    studentAvg = ((midterm * .25) + (finalExam * .25) + (researchPaper * .20) + (groupProject * .20) + (participation * .10));
                    overallAvg = gradeSum / count;

                    if (studentID > 1 && studentID <= 999) {
                        count++;
                        gradeSum += studentAvg;

                        cout << endl
                             << fixed << showpoint << setprecision(2) << "Student ID: " << studentID << ' ' << "Average:  " << studentAvg;
                    }
                    cout << endl
                         << "Total # of Students: " << count
                         << "Overall Class Average: " << overallAvg;
                }

                infile.close();
            };

最佳答案

您需要解决一些语法问题：

printGrade()：

    outfile << endl
            << "Total # of Students: " << count; //<-- bad semicolon
    << "Overall Class Average: " << overallAvg;

gradeCalc()：

    cout << endl
            << "Total # of Students: " << count; //<-- bad semicolon
    << "Overall Class Average: " << overallAvg;

关于c++ - 函数C++中未使用参数，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46942783/