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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4. using namespace std;
  5.  
  6. struct Student
  7. {
  8. 	string ID;
  9. 	string name;
  10. 	double grade;
  11. };
  12.  
  13. int main() {
  14. 	//ifstream inFile;
  15. 	istream &inFile = cin;
  16.  
  17. 	Student* students = nullptr;
  18. 	int counter = 0, capacity = 0;
  19.  
  20. 	string line, netID, studentName;
  21. 	double grade1, grade2, grade3;
  22.  
  23. 	//inFile.open("Asg3Grades.txt"); //opens the file
  24.  
  25. 	while (getline(inFile, line)) {
  26.  
  27.     	istringstream iss(line);
  28.  
  29.     	if (iss >> netID >> studentName >> grade1 >> grade2 >> grade3) {
  30.  
  31.         	double average = (grade1 + grade2 + grade3) / 3;
  32.  
  33.             if (counter == capacity)
  34.             {
  35.                 Student *temp = new Student[capacity + 100];
  36.                 for (int i = 0; i < counter; ++i)
  37.                     temp[i] = students[i];
  38.                 delete[] students;
  39.                 students = temp;
  40.                 capacity += 100;
  41.             }
  42.  
  43.         	students[counter].ID = netID;
  44.         	students[counter].name = studentName;
  45.         	students[counter].grade = average;
  46.  
  47.         	++counter;
  48.     	}
  49. 	}
  50.  
  51. 	//inFile.close(); //closes the file
  52.  
  53. 	for (int i = 0; i < counter; i++) {
  54.     	cout << students[i].ID << ": " << students[i].name << " " << students[i].grade << endl;
  55. 	}
  56.  
  57. 	delete[] students;
  58. 	return 0;
  59. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
1 joe 10 20 30
2 jack 50 75 80
3 john 100 100 100
stdout 
1: joe 20
2: jack 68.3333
3: john 100
https://ideone.com/CkGRSA
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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