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  1. #include <iostream>
  2. #include <string.h>
  3. #include <fstream>
  4. using namespace std;
  5.  
  6. // struct //////////////////////
  7. struct TStudent {
  8.     string name;
  9.     int grade[4];
  10.     float avg;
  11. };
  12. // end struct //////////////////////
  13.  
  14. // class //////////////////////
  15. class CGrade {
  16.  
  17. private:
  18.     int amount;
  19.     TStudent Student[30];
  20.  
  21. public:
  22.     CGrade();
  23.     ~CGrade();
  24.     bool read();
  25.     void display();
  26.     void calculateAvg();
  27.     void sort();
  28.     void write();
  29.     void add();
  30.     void search();
  31. };
  32. // end class //////////////////////
  33.  
  34. // methods //////////////////////
  35. CGrade::CGrade() {}
  36.  
  37. CGrade::~CGrade() {}
  38.  
  39. bool CGrade::read()
  40. {
  41.  
  42.     fstream File;
  43.     int i = 0;
  44.     bool success;
  45.  
  46.     File.open("Text_11-17.txt", ios::in);
  47.  
  48.     if (File.good()) {
  49.  
  50.         while (!File.eof()) {
  51.  
  52.             File >> Student[i].name;
  53.  
  54.             for (int k = 0; k < 4; k++) {
  55.  
  56.                 File >> Student[i].grade[k];
  57.             }
  58.  
  59.             i++;
  60.         }
  61.  
  62.         amount = i;
  63.         success = true;
  64.     }
  65.     else {
  66.  
  67.         cout << "File could not be opened";
  68.         File.close();
  69.  
  70.         success = false;
  71.     }
  72.  
  73.     return success;
  74. }
  75.  
  76. void CGrade::display()
  77. {
  78.  
  79.     for (int i = 0; i < amount; i++) {
  80.  
  81.         cout << ">>>> Name: " << Student[i].name << endl;
  82.  
  83.         for (int k = 0; k < 4; k++) {
  84.  
  85.             cout << "> " << Student[i].grade[k] << endl;
  86.         }
  87.  
  88.         cout << ">> Durchschnitt: " << Student[i].avg << endl
  89.              << endl;
  90.     }
  91. }
  92.  
  93. void CGrade::calculateAvg()
  94. {
  95.  
  96.     float total = 0;
  97.  
  98.     for (int i = 0; i < amount; i++) {
  99.  
  100.         total = 0;
  101.  
  102.         for (int k = 0; k < 4; k++) {
  103.  
  104.             total += Student[i].grade[k];
  105.         }
  106.  
  107.         Student[i].avg = total / 4;
  108.     }
  109. }
  110.  
  111. void CGrade::sort()
  112. {
  113.  
  114.     TStudent swap;
  115.     bool sorted;
  116.  
  117.     do {
  118.  
  119.         sorted = 1;
  120.  
  121.         for (int i = 0; i < amount - 1; i++) {
  122.  
  123.             if (Student[i].avg > Student[i + 1].avg) {
  124.  
  125.                 swap = Student[i];
  126.                 Student[i] = Student[i + 1];
  127.                 Student[i + 1] = swap;
  128.                 sorted = 0;
  129.             }
  130.         }
  131.     } while (sorted == 0);
  132. }
  133.  
  134. void CGrade::write()
  135. {
  136.  
  137.     fstream File;
  138.  
  139.     File.open("Text_11-17_new.txt", ios::out);
  140.  
  141.     if (File.good()) {
  142.         for (int i = 0; i < amount; i++) {
  143.             File << ">>>> Student #" << i + 1 << ":\t" << Student[i].name << " <<<<" << endl
  144.                  << ">> Grades:\t";
  145.  
  146.             for (int k = 0; k < 4; k++) {
  147.                 File << Student[i].grade[k] << " ";
  148.             }
  149.  
  150.             File << endl
  151.                  << "> Average:\t" << Student[i].avg << endl
  152.                  << endl;
  153.         }
  154.     }
  155.     else {
  156.  
  157.         cout << "File could not be opened";
  158.         File.close();
  159.     }
  160. }
  161.  
  162. void CGrade::add()
  163. {
  164.     fstream File;
  165.     string name;
  166.     int grades[4];
  167.  
  168.     cout << "Name des Schuelers:";
  169.     cin >> name;
  170.  
  171.     for (int i = 0; i < 4; i++) {
  172.         cout << "Grade #" << i + 1 << ":";
  173.         cin >> grades[i];
  174.     }
  175.  
  176.     File.open("Text_11-17.txt", ios::out | ios::app);
  177.  
  178.     if (File.good()) {
  179.  
  180.         File << endl
  181.              << name;
  182.  
  183.         for (int i = 0; i < 4; i++) {
  184.             File << " " << grades[i];
  185.         }
  186.     }
  187.     else {
  188.  
  189.         cout << "File could not be opened";
  190.         File.close();
  191.     }
  192. }
  193.  
  194. void CGrade::search() {
  195.  
  196. 	string name;
  197.  
  198. 	cout<<"Enter a name to search for:";
  199. 	cin>>name;
  200.  
  201. 	for (int i=0; i<amount; i++) {
  202.  
  203. 		if(name == Student[i].name) {
  204.  
  205. 			cout<<">> Student found!"<<endl<<endl;
  206.  
  207.         cout << ">>>> Name: " << Student[i].name << endl;
  208.  
  209.         for (int k = 0; k < 4; k++) {
  210.  
  211.             cout << "> " << Student[i].grade[k] << endl;
  212.         }
  213.  
  214.         cout << ">> Durchschnitt: " << Student[i].avg << endl
  215.              << endl;
  216. 		}
  217. 		else {
  218. 			cout<<"Student could not be found";
  219. 		}
  220. 	}
  221. }
  222.  
  223. // end methods //////////////////////
  224.  
  225.  
  226. // main //////////////////////
  227. main()
  228. {
  229.  
  230.     CGrade Grade;
  231. 	int choice;
  232. 	bool continue = true;
  233.  
  234.     if (Grade.read()) {
  235.  
  236. 			Grade.calculateAvg();
  237. 	        Grade.sort();
  238.  
  239.  
  240. 		do {
  241. 			cout<<">>>> Choose an action >>>>"<<endl<<
  242. 					"1)\tDisplay all students"<<endl<<
  243. 					"2)\tCreate new file with more student data"<<endl<<
  244. 					"3)\tAdd a student"<<endl;
  245.  
  246. 			cin>>choice;
  247.  
  248.  
  249. 			switch(choice) {
  250. 				case 1 :a
  251. 					        Grade.display();
  252. 					        break;
  253.  
  254. 					    case 2 :
  255. 					    	        Grade.write();
  256. 					    	        break;
  257.  
  258. 					    	        case 3 :
  259. 					    	        	        Grade.add();
  260. 					    	        	        break;
  261.  
  262. 					    	        	        default:
  263. 					    	        	        	continue=false;
  264. 					    	        	        	break;
  265. 			}
  266.  
  267. 	    } while (continue==true);
  268. 	}
  269. }
  270. // end main //////////////////////
Compilation error #stdin compilation error #stdout 0s 0KB
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Standard input is empty
compilation info 
prog.c:1:20: fatal error: iostream: No such file or directory
 #include <iostream>
                    ^
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/tuynZ1
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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