Question

我正在努力创建一个课程，我们应该让它获得一个成绩列表（最多100个成绩），对它们进行排序，输出平均值和中位数以及5个等级列表每行等级。我完成了代码，它构建并开始运行，但退出时没有输出。单步执行以查找错误，它会跳转到另一个名为crtexe.c的文件中的WPRFLAG行。我想发布我的代码，看看是否有人可以帮我指出正确的方向。现在，我不知道这个wprflag是什么，也不知道为什么我的代码只是退出。

#include <iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<sstream>
using namespace std;
inline void keep_window_open() { char ch; cin>>ch; }
///////////////////////////////Function Prototypes///////////////////////////////
double mean (int[], int);
double median (int[], int);
///////////////////////////////Main//////////////////////////////////////////////
//Main takes input for up to 100 grades and stores in an array then calls the 
//mean and median functions for those calculations then outputs the mean, median,
//and list of grades sorted low to high with 5 grades per line
//Main takes input in as a string and coverts to int. This is to allow user to 
//enter EXIT to end the input loop. There is some error checking built in so 
//use can only enter 0-100 or exit. 
int main ()
{
int counter=0, valueInt=0, numberGrades=0;                      
//counter is used to limit loop to 100 cycles and indicate which element in 
//array to store valueInt
int grades [100] = {0};                 
string valueString=" ";
cout<<"Use this program to calculate the Mean and Median of up to 100 ";
cout<<"grades.\n**Please enter positive real whole numbers only ";
cout<<"(0-100).\n";
do                                              //main input loop
{
    cout<<"Key in a grade and press [Enter] or type EXIT to end list\n";
    cin>>valueString;
        if (valueString=="exit"||valueString=="EXIT"||valueString=="Exit")
        {
            break;
        }
        else
        {
            stringstream convert(valueString);  //converts String to Int
            if (!(convert>>valueInt))           //for array
            {                                   
                valueInt=0;                     
            }                                   

            if (cin.fail())                     //error checking for any 
            {                                   //text input that is not
                cin.clear();                    //"exit"
                cin.ignore(1000,'\n');                  
                cout<<"Incorrect input. Try again\n";
                break;
            }
            if (valueInt<0||valueInt>100)       //error checking for 
            {                                   //0>valueInt>100
                cout<<"Grades can only be 0-100. Please try again.\n";
                break;
            }
            else
            {
                grades[counter]=valueInt;       //Actual input into array
                numberGrades++;
                counter++;
            }
        }
}
while (counter<100);
cout<<"The average grade point is "<<mean(grades, numberGrades)<<".\n";
cout <<"The median grade point is "<<median(grades, numberGrades)<<".\n";

for (int outer=0;outer<numberGrades;outer++)            //sorting loop
{
    for (int inner=0;inner<numberGrades-1;inner++)
    {
        if  (grades[inner]>grades[inner+1])
        {
            swap(grades[inner], grades[inner+1]);
        }
    }
}

counter=0;
for (int i=0;i<counter;i++)                             //print list loop
{
    cout<<grades[counter]<<" ";
    counter++;
    if (i==4)
    {
        cout<<"\n";
    }



                //The next two lines stop the Command Prompt window from 
                //closing until the user presses a key, including Enter.
                cout    << "\nPress enter twice to exit." << endl;
                                                    cin.ignore(2);
}
}
///////////////////////////////Mean//////////////////////////////////////////////
//Mean() finds the averge of the list of grades stored in the grades array and 
//returns that value to the cout statement in main(). 
double mean (int grades[], int numberGrades)
{
double total=0.0;
for (int counter=0;counter<numberGrades+1;counter++)
{
    total+=grades[counter];
}
total=total/numberGrades;
return (total);
}

///////////////////////////////Median////////////////////////////////////////////
//Median() first sorts the values stored in the grades array then finds the 
//median value. If numberGrades is odd value, will show the middle value of the 
//sorted array list. If numberGrades is an even value, will display the average
//of the two middle values in the sorted array list.
double median (int grades[], int numberGrades)              
{
double total=0.0;
for (int outer=0;outer<numberGrades;outer++)            //sorting loop
{
    for (int inner=0;inner<numberGrades-1;inner++)
    {
        if  (grades[inner]>grades[inner+1])
        {
            swap(grades[inner], grades[inner+1]);
        }
    }
}

if (numberGrades%2==0)
{
    total=((grades[numberGrades/2]+grades[numberGrades/2-1])/2);
}
else
{
    total=grades[numberGrades/2];
}
return (total);

}

只是想在任何时候说谢谢你。所有回复都非常感谢！如果我找到答案，我会尝试更新。

Answer 1

将以下行移出main函数中的最终for循环。这让控制台保持打开状态以显示输出。

程序正常编码。由于逻辑错误，我的输出不正确。

//The next two lines stop the Command Prompt window from 
//closing until the user presses a key, including Enter.
cout    << "\nPress enter twice to exit." << endl;
cin.ignore(2);

C ++破解程序 - WPRFLAG？

1 个答案: