Question

我想搜索学生ID，班级，部分，性别，电子邮件和电话号码的记录。这里是代码

void searching()
{

    cout << "\t\t\t\tSearching the Record" << endl;

    int offset;
    std::string se_id, se_name, se_email, se_home, se_clas, se_tele, se_cell, se_sec, se_gender, line;
    ifstream filee;
    filee.open("Student.txt");
    cout << "\nType id of student you want to search:";
    cin >> se_id;
    if (filee.is_open())
    {

        while (!filee.eof())
        {
            getline(filee, line);
            if (((offset = line.find(se_id, 0))) != string::npos)
            {
                cout << "\nId ::" << se_id;
                cout << "\nSearch found";
                break;
            }
        }
        filee.close();
    }
    else
    {
        cout << "search not found";
    }
}

Answer 1

这应该可以得到你想要的东西（见下文）。我留给你检查以确保文件正确打开。此外，让用户知道是否找不到记录可能会有所帮助。

#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;

int main() {
    ifstream in("Student.txt");

    int target_id, id;
    cin >> target_id;

    string record, field;
    // while there are records in the file
    while(getline(in, record)) {
        istringstream ss(record);
        ss >> id;
        // Check to see if target id equals record id
        if(target_id == id) {
            cout << id;
            // It does, so let's print the rest of the fields
            while(getline(ss, field, ',')) {
                cout << field << " ";
            }
            cout << endl;
        }
    }
    in.close();

    return 0;
}

在文件处理中搜索字符串

1 个答案: