rendered paste body#include<string>#include<iostream>#include<fstream>#include<iomanip>using namespace std;void print();int selection();void save();void dataEntry();void load();void calculate(int);void editstud();int getIndex();void deletestud();int dataPtr=0;string filename;string names[10];int exam1[10];int exam2[10];int exam3[10];int final[10];float avg[10];char g[10];ifstream infile;ofstream outfile;int main(){ char a; cout << "Would you like to enter data from an existing file (y/n)? "; cin >> a; cout << endl; if(a=='y') load(); int select(0); while(select != 9) { select=selection(); switch(select) { case 1: print(); break; case 2: dataEntry(); break; case 3: editstud(); break; case 4: deletestud(); break;// case 5:// sort();// break; } } save(); return 0;}void editstud(){ int j(1); while(j != 0) { int i = getIndex(); cout << "Current value of entry " << i+1; cout << " for " << names[i] << " is: " << endl; cout << exam1[i]<<" "<<exam2[i]<<" "<<exam3[i]<<" "<<final[i]<< endl; cout << "Enter new value: " << endl; cin >> exam1[i]>> exam2[i] >> exam3[i] >> final[i]; cout << "New value of entry " << i+1 << " for " << names[i] << " is: " << endl; cout << exam1[i]<<" "<<exam2[i]<<" "<<exam3[i]<<" "<<final[i]<< endl; cout << endl << "Enter 0 to exit or any "; cout << "other value to continue editing: "; cin >> j; calculate(i); } return;}int getIndex(){ int i(0); while(i < 1 || i > 10) { cout << endl << "Please enter index of item "; cout << "you wish to enter." << endl; cout << "Index should be between 1 and 10"<< endl; cin >> i; if(i < 1 || i > 10) cout << "Please enter a number per"; cout << "following instructions:" << endl; } return i-1;}void deletestud(){// int i(0);// int n(0); int i; cout << endl << "Please enter index of item to be deleted: "; cin >> i; for (int j = i; j<dataPtr; j++) { names[j] = names[j+1]; exam1[j] = exam1[j+1]; exam2[j] = exam2[j+1]; exam3[j] = exam3[j+1]; final[j] = final[j+1]; } dataPtr--; // getline(cin, names[i]);// int* a = NULL; // a = new int[n]; // a[i] = 0;// delete [] a; // a = NULL; return;}int selection(){ int i = 0; while(i != 1 && i != 2 && i != 9 && i != 3 && i != 4 && i != 5) { cout << endl << "Please enter activity selection: " << endl; cout << " 1 - Print Student Grades" << endl; cout << " 2 - Add Student" << endl; cout << " 3 - Edit Student" << endl; cout << " 4 - Delete Student" << endl; cout << " 5 - Sort Students" << endl; cout << " 9 - Exit" << endl; cin >> i; } return i;}void dataEntry(){ cout << "Please enter student name: "; cin >> names[dataPtr]; cout << "Please enter four exam grades: "<<endl<<endl; cin >> exam1[dataPtr]; cin >> exam2[dataPtr]; cin >> exam3[dataPtr]; cin >> final[dataPtr]; calculate(dataPtr); dataPtr++; return;}void print(){cout << endl;cout <<" Index Student Exam 1 Exam 2 Exam 3 Final Average Letter" << endl; for(int i=0; i<dataPtr; i++){cout << " " << i+1 << setw(12)<<names[i]<<setw(8)<<exam1[i]<<setw(9)<<exam2[i]<<setw(9)<<exam3[i]<<setw(8)<<final[i]<<setw(10)<<avg[i]<<setw(7)<<g[i]<<endl;}return;}void save(){ cout << "Enter filename to save output " << endl; cout << "example - saved.txt : "; cin >> filename; cout << endl; cout << endl; cout << "---------------------------------------------------------------------" << endl; cout << "File saved in: " << filename << endl; cout << "---------------------------------------------------------------------" << endl; cout << endl; outfile.open(filename.c_str()); for(int i = 0; i<dataPtr; i++) outfile << names[i]<<" "<<exam1[i]<<" "<<exam2[i]<<" "<<exam3[i]<<" "<<final[i]<<" "<<avg[i]<<" "<<g[i]<<endl; outfile.close(); return;}void load(){ cout << "Enter filename to read from " << endl; cout << "example - data.txt : "; cin >> filename; infile.open(filename.c_str()); int loaded=0; while(!infile.eof()) { infile >> names[loaded]>>exam1[loaded]>>exam2[loaded]>>exam3[loaded]>>final[loaded]>>avg[loaded]>>g[loaded]; calculate(loaded); if(names[loaded]=="") break; loaded++; } dataPtr=loaded; infile.close(); return;}void calculate(int i){ avg[i]=((exam1[i]+exam2[i]+exam3[i]+final[i])/4); if(avg[i] <= 100 && avg[i] > 89.9) g[i]='A'; else if(avg[i] <= 89.9 && avg[i] > 79.9) g[i]='B'; else if(avg[i] <= 79.9 && avg[i] > 69.9) g[i]='C'; else if(avg[i] <= 69.9 && avg[i] > 59.9) g[i]='D'; else g[i]='F';return;}