原创 组织程序.cpp 计算学生成绩

/*
Duck 4.75 4.75 5.0 4.9 1.0 3.8
yannzi 3.9 3.8 4.8 4.9 4.2
Agirl 2.0 2.0 5.0 5.0 5.0
*/

// source file for the median function
#include <algorithm>
#include <stdexcept>
#include <vector>
#include "median.h"

using std::domain_error; using std::sort; using std::vector;

double median(vector<double> vec)
{
 typedef vector<double>::size_type vec_sz;
 vec_sz size = vec.size();
 if (size == 0)
  throw domain_error("median of an empty vector");

 sort(vec.begin(), vec.end());
 vec_sz mid = size/2;
 return size % 2 == 0 ? (vec[mid] + vec[mid-1]) / 2 : vec[mid];
}

#ifndef GUARD_median_h
#define GUARD_median_h

//median.h-final version
#include <vector>

double median(std::vector<double>);

#endif

//source file for the grade function
#include <stdexcept>
#include <vector>
#include "grade.h"
#include "median.h"
#include "Student_info.h"

using std::domain_error; using std::vector;

double grade(double midterm, double final, double homework)
{
 return 0.2 * midterm + 0.4 * final + 0.4 * homework;
}

double grade(const Student_info& s)
{
 return grade(s.midterm, s.final, s.homework);
}

double grade(double midterm, double final, const vector<double>& hw)
{
 if (hw.size() == 0)
  throw domain_error("student hax done no homework");
 return grade(midterm, final, median(hw));
}

#ifndef GUARD_grade_h
#define GUARD_grade_h

//grade.h
#include <vector>
#include "Student_info.h"

double grade(double, double, const std::vector<double>&);
double grade(double, double, double);
double grade(const Student_info&);

#endif

#ifndef GUARD_Student_info_h
#define GUARD_Student_info_h

//Student_info.h header file
#include <iostream>
#include <string>
#include <vector>

struct Student_info {
 std::string name;
 double midterm, final;
 std::vector<double> homework;
};

bool compare(const Student_info&, const Student_info&);
std::istream& read(std::istream&, Student_info&);
std::istream& read_hw(std::istream&, std::vector<double>&);
#endif