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目前我想弄清楚为什么我的帮助函数用于计算硬件编号向量的中位数不能正常工作。我的帮助函数假设不仅仅是一个向量。 错误：为什么VecMedian产生超出范围？
./a.out
terminate called after throwing an instance of 'std::out_of_range'
what(): vector::_M_range_check
AVG: 30Aborted
Student.h：
#ifndef STUDENT_H
#define STUDENT_H
#include <iostream>
#include <vector>
#include <string>
using namespace std;
class Student
{
public:
Student(string tname);
double getHWWeight();
void setHWWeight(double arg);
double getmidtermExamWeight();
void setmidtermExamWeight(double arg);
double getfinalExamWeight();
void setfinalExamWeight(double arg);
double getmidterm();
void setmidterm(double arg);
double getfinal();
void setfinal(double arg);
void addHW(double arg);
void readHW(istream &i);
double getHWAverage();
double getHWMedian();
private:
string name;
double midterm;
double final;
vector<double> HW;
static double HWWeight;
static double midtermExamWeight;
static double finalExamWeight;
};
#endif
Student.cpp：
#include "Student.h"
#include <algorithm>
double Student::HWWeight = 60;
double Student::midtermExamWeight = 15;
double Student::finalExamWeight = 25;
template<typename T>
T VecAverage(vector<T> arg){
typename vector<T>::iterator it;
T temp=0;
for(it=arg.begin(); it < arg.end(); it++)temp+=*it;
temp/=arg.size();
return temp;
}
template<typename T>
T VecMedian(vector<T> arg){
int medians = arg.size()/2;
medians+=1;
sort(arg.begin(),arg.end());
return arg.at(medians);
}
Student::Student(string tname){
name = tname;
}
double Student::getHWWeight(){
return HWWeight;
}
void Student::setHWWeight(double arg){
HWWeight = arg;
}
double Student::getmidtermExamWeight(){
return midtermExamWeight;
}
void Student::setmidtermExamWeight(double arg){
midtermExamWeight = arg;
}
double Student::getfinalExamWeight(){
return finalExamWeight;
}
void Student::setfinalExamWeight(double arg){
finalExamWeight = arg;
}
double Student::getmidterm(){
return midterm;
}
void Student::setmidterm(double arg){
midterm = arg;
}
double Student::getfinal(){
return final;
}
void Student::setfinal(double arg){
final = arg;
}
void Student::addHW(double arg){
HW.push_back(arg);
}
void Student::readHW(istream &i){
int x;
i >> x ;
while(x >= 0){
HW.push_back(x);
i >> x;
}
}
double Student::getHWAverage(){
return VecAverage(HW);
}
double Student::getHWMedian(){
return VecMedian(HW);
}
谢谢。