fork download
copy 
  1. /******************************************************************************
  2. Find marks of students out of 40 to 100 and as percentage
  3. Enter admission number to see only his/her details
  4. Added compare_admission_no() method
  5. rakak - 21.06.2022
  6. V 1.2.0
  7. *******************************************************************************/
  8.  
  9. //using namespace std;
  10.  
  11. #include <iostream>
  12. #include <fstream>
  13.  
  14. class Student
  15. {
  16.  
  17.     int admission_no;
  18.     std::string name;
  19.     float english;
  20.     float language;
  21.     float maths;
  22.     float science;
  23.     float sst;
  24.  
  25. public:
  26.     Student()
  27.     {
  28.         admission_no = 0;
  29.         name = "no name";
  30.         english = 0;
  31.         language = 0;
  32.         maths = 0;
  33.         science = 0;
  34.         sst = 0;
  35.     }
  36.  
  37.     Student(int admission_no, std::string name, float english, float language, float maths, float science, float sst)
  38.     {
  39.         this-> admission_no = admission_no;
  40.         this-> name = name;
  41.         this -> english = english;
  42.         this -> language = language;
  43.         this-> maths = maths;
  44.         this-> science = science;
  45.         this-> sst = sst;
  46.     }
  47.  
  48.     void get_details()
  49.     {
  50.         std::cout <<  "Roll Number: " << admission_no << std::endl << "Name: " << \
  51.                   name << std::endl << "English: " << english << std::endl << "Language: " << \
  52.                   language << std::endl << "Maths: " << maths << std::endl << "Science: " << \
  53.                   science << std::endl << "SST: " << sst << std::endl << std::endl;
  54.     }
  55.  
  56.     void convert_marks()
  57.     {
  58.         admission_no;
  59.         name;
  60.         english = (english/40)*100;
  61.         language = (language/40)*100;
  62.         maths = (maths/40)*100;
  63.         science = (science/40)*100;
  64.         sst = (sst/40)*100;
  65.     }
  66.  
  67.     float get_admission_no()
  68.     {
  69.         std::cout << "Enter admission number: ";
  70.         std::cin >> admission_no;
  71.  
  72.         return admission_no;
  73.     }
  74.  
  75.     void compare_admission_no(Student lhs, float rhs)
  76.     {
  77.         if (lhs.admission_no == rhs) {
  78.             std::cout << "Marks out of 40:" << std::endl;
  79.             lhs.get_details();
  80.             std::cout << std::endl << "Marks out of 100:" << std::endl;
  81.             lhs.convert_marks();
  82.             lhs.get_details();
  83.         } else {
  84.             std::cout << "Student is not in the database" << std::endl;
  85.         }
  86.     }
  87. };
  88.  
  89. void file_not_exist_create(std::string file_name){
  90.      std::string filename = file_name;
  91.      std::fstream marks_file;
  92.  
  93.      marks_file.open(filename, std::fstream::in | std::fstream::out | std::fstream::app);
  94.  
  95.  
  96.       // If file does not exist, Create new file
  97.       if (!marks_file)
  98.       {
  99.         std::cout << "Cannot open file, file does not exist. Creating new file..";
  100.  
  101.         marks_file.open(filename, std::fstream::in | std::fstream::out | std::fstream::trunc);
  102.         marks_file << std::endl;
  103.         marks_file.close();
  104.  
  105.        }
  106.       else   
  107.       {    // use existing file - Append, Write, Work with the opened file
  108.          std::cout << filename << " exist." << std::endl;
  109.  
  110.          marks_file << "Appending writing and working with existing file" << std::endl;
  111.          marks_file.close();
  112.          std::cout << std::endl;
  113.       }
  114. }
  115.  
  116.  
  117.  
  118. int main()
  119. {
  120.     Student s1(1,"Pavithra",33,36,31,39,35), s2(2,"Abhinav",22,31,29,24,37), s3(3,"David",25,21,29,31,33);
  121.  
  122.     Student sid, comp;
  123.     float result = sid.get_admission_no();
  124.  
  125.     comp.compare_admission_no(s1,result);
  126.     comp.compare_admission_no(s2,result);
  127.     comp.compare_admission_no(s3,result);
  128.  
  129.     file_not_exist_create("marks.txt");
  130.  
  131.     return 0;
  132. }
  133.  
  134.  
  135.  
  136.  
  137.  
Success #stdin #stdout 0.01s 5516KB
comments (?)
stdin
copy 
2
5
1
1
1
1
6
2
1
3
stdout
copy 
Enter admission number: Student is not in the database
Marks out of 40:
Roll Number: 2
Name: Abhinav
English: 22
Language: 31
Maths: 29
Science: 24
SST: 37


Marks out of 100:
Roll Number: 2
Name: Abhinav
English: 55
Language: 77.5
Maths: 72.5
Science: 60
SST: 92.5

Student is not in the database
Cannot open file, file does not exist. Creating new file..
https://ideone.com/zsiv6x
language:
C++ 4.3.2 (gcc-4.3.2)
created:
1 year 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!