C ++ sstream从文件中跳过前三个输入

时间:2016-03-11 21:12:51

标签: c++ sstream

我需要以这种格式打开文件

Dat Nguyen 77.7 88.8 99.9 11.1 22.2

Pat Nguyen 2 3 4 5 6 

我需要将一行的第一个名称分配给结构的成员数组,并将该行的最后一个名称分配给结构的另一个成员,并将该行的每个数字分配给结构中的分数数组,每个新行进行到结构数组的下一个索引,做同样的事情(对不起,如果我说得那么糟糕)。

我的名字和姓氏分配很顺利但是当它将数字分配给结构成员时,它会跳过前三个数字。我做错了什么?

这是我的代码

void fileLoad(Gradebook *students, int &stuCount, int &assignments)
{
ifstream fin;
fin.open("Scores.txt");
if (!fin.is_open())
    cout << "Failed to open file.\n";

if (stuCount < 10)
{
    int n = 0;
    string tempLine;
    string line[10];
    while (!fin.eof())
    {
        getline(fin, tempLine);
        line[n] = tempLine;
        stringstream ss(tempLine);
        ss >> students[stuCount].fname >> students[stuCount].lname;
        assignments = 0;
        for (int i = 0; tempLine[i] != '\0'; i++)
        {
            ss >> students[stuCount].score[assignments];
            if (tempLine[i] == ' ')
                assignments++;

        }
        cout << line[n] << endl;
        assignments--;
        stuCount++;
        n++;
        cout << assignments << endl;
    }
}
else
    cout << "Already max students.\n";
}

这是输出

Dat Nguyen 77.7 88.8 99.9 11.1 22.2


Pat Nguyen 2 3 4 5 6


1. Add a new student to the class
2. Assign grades for a new assignment
3. List one student, displaying all their grades and their course average
4. List all the scores for a chosen assignment
5. Display all grades currently contained in the gradebook
6. Save the gradebook to file
7. Exit the program
Enter choice: 3

Enter a student #: 1

Dat Nguyen

Assignment 1: 11.1

Assignment 2: 22.2

Assignment 3: -9.25596e+61

Assignment 4: -9.25596e+61

Assignment 5: -9.25596e+61

Assignment 6: -9.25596e+61

Average: -5.28912e+61

1 个答案:

答案 0 :(得分:0)

这一点逻辑是可疑的:

tempLine

这将逐个遍历ss中的所有字符,并尝试从ss读取整个单词。想一想:对于每个角色,请阅读整个单词。 tempLine包含ss的副本,但除此之外,它们是单独的实体。读取字大小的块中的tempLinechar大小的块中的while (assignments < MAX_ASSIGMENTS && ss >> students[stuCount].score[assignments]) { // read all assignments until array full or couldn't read an assignment score assignments++; } ,字会在循环终止之前很久就会用完。由于OP不会测试单词的读取是否成功,Crom只知道发生了什么。

我想你想要更像的东西:

MAX_ASSIGMENTS

score是用于调整if (((ItemAttachment)attachment).Item is EmailMessage) { EmailMessage msg = ((ItemAttachment)attachment).Item as EmailMessage; msg.Load(new PropertySet(ItemSchema.MimeContent)); byte[] content = msg.MimeContent.Content; } 数组大小的OP的占位符。