fork download
copy 
  1. #include<iostream>
  2. #include<list>
  3. #include<algorithm>
  4. #include<vector>
  5.  
  6.  
  7. using namespace std;
  8.  
  9. class student
  10. {
  11.     public:
  12.     string name;
  13.     int roll_number;
  14.  
  15.     student(string n,int rn)
  16.     {
  17.         name=n;
  18.         roll_number=rn;
  19.     }
  20. };
  21.  
  22. struct StudentNameIs {
  23.    std::string key;
  24.    StudentNameIs(const std::string& k) : key(k) {}
  25.    bool operator()(const student& s) const { return key == s.name; }
  26. };
  27.  
  28. void display(list<student> &s)
  29. {
  30.     list<student> :: iterator p;
  31.     for(p=s.begin();p!=s.end();p++)
  32.     cout<<p->name<<" "<<p->roll_number<<endl;
  33. }
  34. int main()
  35. {
  36.     student s1("J",63),s2("P",29),s3("M",12),s4("S",71),s5("R",04);
  37.     list<student> student_list;
  38.  
  39.     student_list.push_back(s1);
  40.     student_list.push_back(s2);
  41.     student_list.push_back(s3);
  42.     student_list.push_back(s4);
  43.     student_list.push_back(s5);
  44.  
  45.    display(student_list);
  46.  
  47.    list<student> :: iterator q;
  48.    string temp;
  49.     list<student> :: iterator s,e;
  50.     s=student_list.begin();
  51.     e=student_list.end();
  52. //Accepting name of the student from the user to display roll number of it.
  53.  
  54.    cout<<"Please Enter the name of student:"<<endl;
  55.    cin>>temp;
  56.  
  57.  
  58.    q=find_if(s, e, StudentNameIs(temp));
  59.  
  60.    cout<<"The number is "<<q->roll_number<<endl;
  61.     return 0;
  62. }
  63.  
Success #stdin #stdout 0s 2992KB
comments (?)
stdin
copy 
S
stdout
copy 
J 63
P 29
M 12
S 71
R 4
Please Enter the name of student:
The number is 71
https://ideone.com/qnNyQC
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!