Visual c++ 需要文本文件二维阵列制导

此程序需要读取一个文本文件：

艾米100 100 90 95 85 100 90 100 98 75

鲍勃90 92 82 95 89 93 95 97 96 98 92

尼娜100 90 95 85 100 65 75 95 100 90 60

EVA9890958510090951009082

马特100 90 95 85 85 90 95 100 78

湿婆90 90 95 100 75 100 100 90 92 82 68

然后，使用switch语句提示用户选择名称，并显示输入选项的最高、最低和平均分数

这就是我一直在做的

如何允许switch语句从数组中获取信息？我还发现格式文件>>name[]有错误

using namespace std;

void PrintLines (int numlines); //for the border "*"
int main()
{
    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);
    ifstream file;
    ofstream file;
    file.open("gradename.txt"); 
    if(file.fail())
    {
        cout<< ("cant open text");
        //system("pause");
        return 1;
    }

    string name[6]; //array to store the names
    int scores[6][11]; //array to store the scores
    int x, y;
    for(int x = 0; x < 6; x++)
    {
        file>>name[x]; //change this error?
        for(int y = 0; y < 11; y++)
            file >> scores[x][y];
    }

    {
        int number = 0; 
        double ave = 0.0 ;
        double sum = 0;
        int count = 0;
        int max = 0;
        int min = 100;
        int selection=0;

        while (!file.eof())
        {
            if(count != 0) 
            {
                if(number>max)
                    max=number;
                    if(number<min)
                        min=number;
            }
            sum+=number;
            count+=1;
            file>>number;
        }

        ave = sum / (count-1);

        ////end of calculation
        int numlines=0; //initializing new variable to print *
        cout<< "\nHow many lines of * do you want to print"<<endl; //asking user for input for 
        border *
        cin>> numlines;
        PrintLines(numlines);

        cout<<"\n\n Whose grades would you like to see\n 
        Enter 1 for Amy, 2 for Bob or 3 for Nina, 

        4 for Eva, 5 for Matt or 6 for Shiva.... \n "<< endl; // User's choice

        switch(selection) 
        {

            case 1:
                cout << "Amy's\n Highest grade is:" << max << "\nLowest grade:"<< min << "\nAverage grade:"<< ave << "\n";
                break;
            case 2:
                cout << "Bob's\n Highest grade is:" << max << "\nLowest grade:" << min << "\nAverage grade:" << ave << "\n";
                break;
            case 3:
                cout << "Nina's\n Highest grade is:" << max << "\nLowest grade:" << min << "\nAverage grade:" << ave << "\n";
                break;
            case 4:
                cout << "Eva's\n Highest grade is:" << max << "\nLowest grade:" << min << "\nAverage grade:" << ave << "\n";
                break;
            case 5:
                cout << "Matt's\n Highest grade is:" << max << "\nLowest grade:" << min << "\nAverage grade:" << ave << "\n";
                break;
            case 6:
                cout << "Shiva's\n Highest grade is:" << max << "\nLowest grade:" << min << "\nAverage grade:" << ave << "\n";
                break;
            default:
                cout << "\n Invalid\n"; 
                break;
        }
        cout << "How many lines of * do you want to print" << endl;
        cin >> numlines;
        PrintLines(numlines);
    }

    file.close(); //closing file
    system("pause");
    return 0;
}

void PrintLines(int numlines) //function that contains the output for *
{
    for (int count =1; count <=numlines; count++)
    cout << "************************************************************************" << endl;
}

---

试试这个代码。注意：我假设您的文件如下所示：

Amy 100 100 90 95 85 100 90 100 100 98 75
Bob 90 92 82 95 89 93 95 97 96 98 92
Nina 100 90 95 85 100 65 75 95 100 90 60
Eva 98 90 95 85 100 90 90 95 100 90 82
Matt 100 100 90 95 85 75 85 90 95 100 78
Shiva 90 90 95 100 75 100 100 90 92 82 68

现在代码是：

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <map>
#include <numeric>

using namespace std;

void PrintLines (int numlines); //for the border "*"

int main( )

{

    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);

    ifstream file;

    //ofstream file;

    file.open("Path to your file\\gradename.txt");

    if(file.fail()) {
        cout<< ("cant open text");
        return 1;
    }

    map<string, vector<int> > scores; //[6][11]; //array to store the scores

    for (int x = 0; x < 6; ++x) {

        string name;
        file >> name; //change this error?

        vector<int> scoresOfName;
        for(int y = 0; y < 11; y++) {
            int score;
            file >> score;
            scoresOfName.push_back(score);
        }
        scores[name] = scoresOfName;
    }

    {


        int numlines;
        cout<< "\nHow many lines of * do you want to print"<

        cin >> numlines;

        PrintLines(numlines);

        cout<<"\n\n Whose grades would you like to see\n Enter 1 for Amy, 2 for Bob or 3 for Nina,4 for Eva, 5 for Matt or 6 for Shiva.... \n "<< endl; // User's choice
        int selection;
        cin >> selection;
        string chName = "";
        switch(selection)
        {
        case 1:
            chName = "Amy";
            break;
        case 2:
            chName = "Bob";
            break;
        case 3:
            chName = "Nina";
            break;
        case 4:
            chName = "Eva";
            break;
        case 5:
            chName = "Matt";
            break;
        case 6:
            chName = "Shiva";
            break;
        default:
            cout << "\n Invalid input\n";
            break;
        }

        cout << "Your choice is " << chName;


        cout << "\n" << chName << "'s\n Highest grade is:"
             << *(max_element(scores[chName].begin(), scores[chName].end()))
             << "\nLowest grade:"
             << *(min_element(scores[chName].begin(), scores[chName].end()))
             << "\nAverage grade:"
             << accumulate(scores[chName].begin(), scores[chName].end(), 0) / 10
             << "\n";



        cout << "How many lines of * do you want to print" << endl;
        cin >> numlines;
        PrintLines(numlines);

    }

    file.close(); //closing file

    cin.get();

    return 0;

}

void PrintLines(int numlines) //function that contains the output for *

{
    for (int count =1; count <=numlines; count++)
        cout << "********************************************************************" << endl;
}

---

非常感谢你！当我试图构建它时，我遇到了错误……但我意识到这是因为我没有包含