#include #include #include

using namespace std;

int main() { const int MAX_STUDENTS = 30; const int MAX_ASSIGNMENTS = 10;

int numAssignments = 0; int numStudents; int assignments[MAX_STUDENTS][MAX_ASSIGNMENTS]; string studentNames[MAX_STUDENTS]; char choice;

cout << "Do you want to load from file(y or n)? "; cin >> choice; if (choice == 'y') { ifstream in("students.txt"); if (in.is_open()) { in >> numStudents; in >> numAssignments; for (int i = 0; i < numStudents; ++i) { in >> studentNames[i]; } for (int i = 0; i < numStudents; ++i) { for (int j = 0; j < numAssignments; ++j) { in >> assignments[i][j]; } } in.close(); } } else { cout << "Please enter the number of students currently enrolled (max " << MAX_STUDENTS << "): "; cin >> numStudents; if (numStudents > 30) { numStudents = 30; cout << "The number of students has been reduced to the max " << MAX_STUDENTS << "." << endl; } for (int i = 0; i < numStudents; i++) { cout << "Enter student " << i + 1 << "'s name: "; cin >> studentNames[i]; } } char command = ' '; while (command != 'q') { system("CLS"); // print the gradebook to screen. for (int i = 0; i < numStudents; i++) { cout << studentNames[i] << "\t"; if (studentNames[i].size() < 8) { cout << "\t"; } for (int j = 0; j < numAssignments; j++) { cout << assignments[i][j] << "\t"; } cout << endl; } cout << "Do you want to add a (s)tudent, add an (a)ssignment, (c)urve a grade (q)uit? "; cin >> command; system("CLS"); switch (command) { case 's': cout << "Please enter the new student's name: "; cin >> studentNames[numStudents]; for (int i = 0; i < numAssignments; i++) { cout << "Please enter " << studentNames[numStudents] << "'s grade for assignment " << i + 1 << ": "; cin >> assignments[numStudents][i]; } numStudents++; break; case 'a': for (int i = 0; i < numStudents; i++) { cout << "Please enter " << studentNames[i] << "'s grade for the new assignemnt: "; cin >> assignments[i][numAssignments]; } numAssignments++; break; case 'c': { int assignmentToCurve = -1; cout << "Which Assignment do you wish to curve (1-" << numAssignments << "): "; cin >> assignmentToCurve; //adjust for arrays starting at 0; assignmentToCurve--; int sum = 0; for (int i = 0; i < numStudents; i++) { sum += assignments[i][assignmentToCurve]; } float average = (float)sum / numStudents; if (average < 70) { for (int i = 0; i < numStudents; i++) { assignments[i][assignmentToCurve] += (70 - average); } cout << "curve of " << (int)(70 - average) << " applied!" << endl; } else { cout << "No curve needed!" << endl; }

break; } case 'q': break; default: cout << command << " is an invalid command!" << endl; break; } system("PAUSE"); } ofstream out("students.txt"); out << numStudents << endl; out << numAssignments << endl; for (int i = 0; i < numStudents; ++i) { out << studentNames[i] << endl; } for (int i = 0; i < numStudents; ++i) { for (int j = 0; j < numAssignments; ++j) { out << assignments[i][j] << " "; } out << endl; } out << endl; out.close(); }

can someone covert this code from C++ to java?

#include #include #include

using namespace std;

int main() { const int MAX_STUDENTS = 30; const int MAX_ASSIGNMENTS = 10;

int numAssignments = 0; int numStudents; int assignments[MAX_STUDENTS][MAX_ASSIGNMENTS]; string studentNames[MAX_STUDENTS]; char choice;

cout << "Do you want to load from file(y or n)? "; cin >> choice; if (choice == 'y') { ifstream in("students.txt"); if (in.is_open()) { in >> numStudents; in >> numAssignments; for (int i = 0; i < numStudents; ++i) { in >> studentNames[i]; } for (int i = 0; i < numStudents; ++i) { for (int j = 0; j < numAssignments; ++j) { in >> assignments[i][j]; } } in.close(); } } else { cout << "Please enter the number of students currently enrolled (max " << MAX_STUDENTS << "): "; cin >> numStudents; if (numStudents > 30) { numStudents = 30; cout << "The number of students has been reduced to the max " << MAX_STUDENTS << "." << endl; } for (int i = 0; i < numStudents; i++) { cout << "Enter student " << i + 1 << "'s name: "; cin >> studentNames[i]; } } char command = ' '; while (command != 'q') { system("CLS"); // print the gradebook to screen. for (int i = 0; i < numStudents; i++) { cout << studentNames[i] << "\t"; if (studentNames[i].size() < 8) { cout << "\t"; } for (int j = 0; j < numAssignments; j++) { cout << assignments[i][j] << "\t"; } cout << endl; } cout << "Do you want to add a (s)tudent, add an (a)ssignment, (c)urve a grade (q)uit? "; cin >> command; system("CLS"); switch (command) { case 's': cout << "Please enter the new student's name: "; cin >> studentNames[numStudents]; for (int i = 0; i < numAssignments; i++) { cout << "Please enter " << studentNames[numStudents] << "'s grade for assignment " << i + 1 << ": "; cin >> assignments[numStudents][i]; } numStudents++; break; case 'a': for (int i = 0; i < numStudents; i++) { cout << "Please enter " << studentNames[i] << "'s grade for the new assignemnt: "; cin >> assignments[i][numAssignments]; } numAssignments++; break; case 'c': { int assignmentToCurve = -1; cout << "Which Assignment do you wish to curve (1-" << numAssignments << "): "; cin >> assignmentToCurve; //adjust for arrays starting at 0; assignmentToCurve--; int sum = 0; for (int i = 0; i < numStudents; i++) { sum += assignments[i][assignmentToCurve]; } float average = (float)sum / numStudents; if (average < 70) { for (int i = 0; i < numStudents; i++) { assignments[i][assignmentToCurve] += (70 - average); } cout << "curve of " << (int)(70 - average) << " applied!" << endl; } else { cout << "No curve needed!" << endl; }

break; } case 'q': break; default: cout << command << " is an invalid command!" << endl; break; } system("PAUSE"); } ofstream out("students.txt"); out << numStudents << endl; out << numAssignments << endl; for (int i = 0; i < numStudents; ++i) { out << studentNames[i] << endl; } for (int i = 0; i < numStudents; ++i) { for (int j = 0; j < numAssignments; ++j) { out << assignments[i][j] << " "; } out << endl; } out << endl; out.close(); }