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  1. #include <iostream>
  2. #include <iomanip>
  3. #include <map>
  4. #include <set>
  5. #include <cmath>
  6. #include <vector>
  7. #include <climits>
  8. #include <string>
  9. #include <algorithm>
  10. #include <sstream>
  11. #include <numeric>
  12. using namespace std;
  13.  
  14. vector<string> split(string haystack, string needle) {
  15.     vector<string> result;
  16.     int startPos = 0;
  17.     int foundPos = haystack.find(needle, startPos);
  18.     while (foundPos != string::npos) {
  19.         int count = foundPos - startPos;
  20.         string token = haystack.substr(startPos, count);
  21.         if (!token.empty()) {
  22.             result.push_back(token);
  23.         }
  24.         startPos = foundPos + needle.length();
  25.         foundPos = haystack.find(needle, startPos);
  26.     }
  27.     string token = haystack.substr(startPos, haystack.length() - startPos);
  28.     if (!token.empty()) {
  29.         result.push_back(token);
  30.     }
  31.     return result;
  32. }
  33.  
  34. string nameConvert(const string& name) {
  35.     const string DELIMITER = " ";
  36.     stringstream builder;
  37.     auto parts = split(name, DELIMITER);
  38.     for (auto part : parts) {
  39.         part[0] = toupper(part[0]);
  40.         transform(part.begin() + 1, part.end(), part.begin() + 1, ::tolower);
  41.         builder << part << DELIMITER;
  42.     }
  43.     return builder.str();
  44. }
  45.  
  46. string dateConvert(const string& date) {
  47.     const string DELIMITER = "/";
  48.     stringstream builder;
  49.     auto parts = split(date, DELIMITER);
  50.     builder << setw(2) << setfill('0') << parts[0] << DELIMITER;
  51.     builder << setw(2) << setfill('0') << parts[1] << DELIMITER;
  52.     builder << parts[2];
  53.     return builder.str();
  54. }
  55.  
  56. class StudentIDGenerator {
  57. private:
  58.     inline static string const PREFIX = "SV";
  59.     inline static int const MAX = 3;
  60.     inline static int index = 1;
  61.  
  62. public:
  63.     static string generate() {
  64.         stringstream builder;
  65.         builder << PREFIX << setw(MAX) << setfill('0') << index;
  66.         index++;
  67.         return builder.str();
  68.     }
  69. };
  70.  
  71. class Student {
  72. private:
  73.     string id, name, className, email;
  74. public:
  75.  
  76.     Student() : id(""), name(""), className(""), email("") {};
  77.  
  78.     Student(string id, string name, string className, string email) :
  79.         id(id), name(name), className(className), email(email) {
  80.     };
  81. public:
  82.     void setName(string name) {
  83.         this->name = name;
  84.     }
  85.     void setClass(string className) {
  86.         this->className = className;
  87.     }
  88.     void setEmail(string email) {
  89.         this->email = email;
  90.     }
  91.     void setID(string id) {
  92.         this->id = id;
  93.     }
  94.  
  95. public:
  96.     string getClassName() {
  97.         return this->className;
  98.     }
  99. public:
  100.     string toString() {
  101.         stringstream builder;
  102.         builder << id << " " << name << " " << className << " " << email << endl;
  103.         return builder.str();
  104.     }
  105.  
  106. public:
  107.     bool operator <(const Student& other) {
  108.         if (this->className != other.className) {
  109.             return this->className < other.className;
  110.         }
  111.         return this->id < other.id;
  112.     }
  113. };
  114.  
  115. class StudentFromKeyboardProvider {
  116. public:
  117.     static Student next() {
  118.         string buffer;
  119.  
  120.         Student student;
  121.  
  122.         getline(cin, buffer);
  123.         student.setID(buffer);
  124.  
  125.         getline(cin, buffer);
  126.         student.setName(buffer);
  127.  
  128.         getline(cin, buffer);
  129.         student.setClass(buffer);
  130.  
  131.         getline(cin, buffer);
  132.         student.setEmail(buffer);
  133.  
  134.         return student;
  135.     }
  136. };
  137.  
  138. int main() {
  139.     ios_base::sync_with_stdio(false);
  140.     cin.tie(NULL);
  141.  
  142.     int n;cin >> n;
  143.     cin.ignore();
  144.     vector<Student> students;
  145.     for (int i = 0;i < n;i++) {
  146.         Student student = StudentFromKeyboardProvider::next();
  147.         students.push_back(student);
  148.     }
  149.  
  150.     int q;cin >> q;
  151.     for (int i = 0;i < q;i++) {
  152.         string value;cin >> value;
  153.         cout << "DANH SACH SINH VIEN LOP " << value << " :" << endl;
  154.         for (int j = 0;j < students.size();j++) {
  155.             if (students[j].getClassName() == value) {
  156.                 cout << students[j].toString();
  157.             }
  158.         }
  159.     }
  160.     return 0;
  161. }
  162.  
Success #stdin #stdout 0s 5328KB
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https://ideone.com/54XF37
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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