project.cpp

#include<iostream>
#include<fstream>
#include<iomanip>
#include<cctype>
using namespace std;
int SIZE =0;
const int MARK6=6;
const int MAX=100;
struct Student {
	
    int id;
    string Fname;
    string Lname;
    string major;
    int level;
    int marks[MARK6];
    float Tmarks;
    float grade;
};
Student students[MAX];
void load(){
	ifstream file; 
	file.open("D:/students.txt");
	while(file>>students[SIZE].id>>students[SIZE].Fname>>students[SIZE].Lname>>
	students[SIZE].major>>students[SIZE].level>>students[SIZE].Tmarks>>students[SIZE].grade)
		SIZE++;
	file.close();
}
void save_in_file(){
	ofstream file; 
file.open("D:/students.txt");
	 for (int i = 0; i < SIZE; i++){
	 	file<<students[i].id<<" "<<students[i].Fname<<" "<<
		 students[i].Lname<<" "<<students[i].major<<" "<<
		 students[i].level<<" "<<students[i].Tmarks<<" "<<
		 students[i].grade<<endl;
	 }
	file.close();
}
bool check(string& name) {
    char ch[name.size()];
    bool rename=true;
   
    for (int i = 0; i < name.size(); i++) {
       ch[i]=name[i];
    if (!((ch[i] >= 'A' && ch[i] <= 'Z') || (ch[i] >= 'a' && ch[i] <= 'z') )) {
            rename= false;
    }
}
  for (int i = 1; i < name.size(); i++) {
       name[i] = tolower(name[i]);
}
      name[0] = toupper(name[0]);
return rename;
}
bool remajor( string& major){
    string virb[4] = {"it", "is", "cs", "cys"};
    	for (int i=0;i<major.size();i++){
			major[i]=toupper(major[i]);
}
      
   for (int i = 0; i < 4; ++i) {
        if (strcasecmp(major.c_str(), virb[i].c_str()) == 0)
      return true;
    }    
 return false;
}
 bool input(int mrk,int arae){
  if(mrk>0&&mrk<=arae)
   	return true;
   	return false;
}
void Dis_Search(int i){
	cout<<setw(10)<<"ID"<<setw(10)<<"name"<<setw(16)<<"major"<<setw(10)<<
	    "level"<<setw(10)<<"T_marks"<<setw(13)<<"grade"<<endl;
	cout<<"-----------------------------------------------------------------------"<<endl;
	cout<< "\t"<< students[i].id<< "\t"<< students[i].Fname<< " "<< 
		students[i].Lname<< "\t"<< students[i].major<< "\t"<<setw(4)<<
		students[i].level<<setw(11)<<students[i].Tmarks<<
		setw(2)<< "\t"<< students[i].grade<<endl;
}		
void Add_Student(){
	      system("cls");
	add:  
	  int id;
      char y;
         cout <<endl;
	     cout <<"\tEnter student Info : \n";					
         cout << " ~Enter student ID: ";
         cin>>students[SIZE].id;
	do{
         cout << " ~Enter student first name  : ";
         cin >>students[SIZE].Fname;
     if (!check(students[SIZE].Fname)) {
         cout << "\t Error:  First Name!" << endl;}
       }while(check(students[SIZE].Fname)!=1);
  
     do{
         cout << " ~Enter student last name: ";
         cin >> students[SIZE].Lname;
         if (!check(students[SIZE].Lname)) {
         cout <<" \t Error:  last Name!" << endl; }
         }while( check(students[SIZE].Lname)!=1);           
	 do{
         cout << " ~Enter student major (IT, IS, CS, CYS): ";
         cin >> students[SIZE].major;
     if (!remajor(students[SIZE].major)) {
         cout <<" \t Error:!" << endl; }
         }while(!remajor(students[SIZE].major));  
	 do{
             cout << " ~Enter student level (1-4): ";
            cin >> students[SIZE].level;
            if (input(students[SIZE].level,4)!=1){
            	 cout << "\t Error:  "<< endl;
			}
       }while(!input(students[SIZE].level,4));        
        cout << " ~Enter student marks for " << MARK6 << " subjects: \n";
      for (int i = 0; i < MARK6; i++) {
   	do{
        	cout<<"mark "<<i+1<<": ";
          cin >> students[SIZE].marks[i];
     if (input(students[SIZE].marks[i],100)!=1){
            	 cout << "\t Error:  "<< endl;
			}
       }while(input(students[SIZE].marks[i],100)!=1);
           students[SIZE].Tmarks += students[SIZE].marks[i];
        }
         students[SIZE].grade =students[SIZE].Tmarks/MARK6;
           SIZE++;
          save_in_file(); 
				cout<<endl;					  	
         cout <<setw(40)<< "Student record added successfully!" << endl;
                cout<<endl;	
         cout<<setw(40)<<"Press 'y' if you want to add another student: ";
        	cin>>y;
 	if(y=='y'||y=='Y'){
	 goto add;
       }else{
			cout<<setw(20)<<"out"<<endl;
	}
}
  void Edit_Student(){   
     	system("cls");
  	edit:
      char y;
      int id;
          cout <<endl;
    	  cout << " ~Enter student ID to edit: ";
      	cin >> id;
      
    for (int i = 0; i < SIZE; i++) {
     if (students[i].id == id) {
			 Dis_Search(i);
	 cout <<"\tEnter student Info \n";					
	 do{
        cout << " ~Enter student first name :  ";
        cin >>students[i].Fname;
        if (!check(students[i].Fname)) {
       cout << "\t Error:  First Name!" << endl;}
	    }while(check(students[i].Fname)!=1);
     do{
        cout << " ~Enter student last name: ";
        cin >> students[i].Lname;
     if (!check(students[i].Lname)) {
        cout <<" \t Error:  last Name!" << endl; }
        }while(check(students[i].Lname)!=1);
	 do{
        cout << " ~Enter student major (IT, IS, CS, CYS): ";
        cin >> students[i].major;
     if (!remajor(students[i].major)) {
        cout <<" \t Error:!" << endl; }
        }while(!remajor(students[i].major));  
	do{
             cout << " ~Enter student level (1-4): ";
            cin >> students[i].level;
     if (input(students[i].level,4)!=1){
            	 cout << "\t Error:  "<< endl;}
        }while(input(students[i].level,4)!=1);
			 
                students[i].Tmarks=0;
        cout << " ~Enter student marks for " << MARK6 << " subjects: \n";
        for (int i = 0; i < MARK6; i++) {
    do{
        	cout<<"mark "<<i+1<<": ";
          cin >> students[i].marks[i];
     if (input(students[i].marks[i],100)!=1){
            	 cout << "\t Error:  "<< endl;
			}
        }while(input(students[i].marks[i],100)!=1);
           students[i].Tmarks += students[i].marks[i];
        }
       students[i].grade =students[i].Tmarks/MARK6;
          save_in_file(); 
               cout<<endl;	
			   cout << "\tStudent record edit successfully!" << endl;				  	
        break;   
  	}       
}        cout<<endl;	
		 cout<<setw(20)<<"Press 'y' if you want to edit another student: ";
        	cin>>y;
	 if(y=='y'||y=='Y'){
	    goto edit;
           }else{
			cout<<setw(20)<<"out"<<endl;
		}
	}	
void Delete_Student(){
	  system("cls");
     delet: 
	  int id,i;
	  char y;
      bool found = false;
        cout <<endl;
    	cout << " ~Enter student ID: ";
    		cin >> id;
    
    for (i = 0; i < SIZE; i++) {
        if (students[i].id == id) {
         	found=true;
			 break;    
		  }
	 }
	 for (; i < SIZE-1; i++){
	 	students[i]=students[i+1];
	 }
	 system("cls");
	 if(found==1){
	 SIZE--;	
   	save_in_file();
    	 cout<<endl;	
     	cout<<"deleted student\n";
	} cout<<endl;	
	 cout<<setw(40)<<"Press 'y' if you want to delet another student: ";
        	cin>>y;
	 if(y=='y'||y=='Y'){
	    goto delet;
       }else{
			cout<<setw(20)<<"out"<<endl;
				}
}
void search_Student(){
	system("cls");
	string name;
		int num,id;
	do{     cout <<endl;
			cout << "1)To search by name \n";
			cout << "2)To search by id \n";
		    cout << "3)To exit main\n\n";
		    cout <<" ~Enter your choice :_";
			cin>>num;
	   if(num==1){
				cout << " ~Enter student first name: ";
				cin>>name;
				check(name);
				for (int i = 0; i < SIZE; i++) {
			    	if (students[i].Fname == name){
			    		         Dis_Search(i);
				 }
	 		}
	   }else if(num==2){
				cout << " ~Enter new student ID: ";
				cin>>id;
				for (int i = 0; i < SIZE; i++) {
			     	if (students[i].id ==id){     		      		
		   			           Dis_Search(i);
			     }
	 		}
	  	}	
	}while(num!=3);
}
void Display_Id(){
		system("cls");
		 int sort[SIZE]; 
		 cout <<endl;
         cout<<setw(10)<<"ID"<<setw(10)<<"name"<<setw(16)<<"major"<<
         setw(10)<<"level"<<setw(10)<<"T_marks"<<setw(13)<<"grade"<<endl;
	 for (int i = 0; i <SIZE; i++){
	 	sort[i]=students[i].id;
		 }
    for (int i = 0; i < SIZE - 1; i++) {
        for (int j = 0; j < SIZE - i - 1; j++) {
            if (sort[j] > sort[j + 1]) {     
                int temp = sort[j];
                sort[j] = sort[j + 1];
                sort[j + 1] = temp;
            }
        }
    }			for (int j = 0; j < SIZE; j++) {
			for (int i = 0; i < SIZE; i++) {
            if (sort[j]==students[i].id) {
			cout<<"-----------------------------------------------------------------------"<<endl;
	 		cout<< "\t"<< students[i].id<< "\t"<< students[i].Fname<< " "<< 
			 students[i].Lname<< "\t"<< students[i].major<< "\t"<<setw(4)<<
		 	students[i].level<<setw(11)<<students[i].Tmarks<<
			 setw(2)<< "\t"<< students[i].grade<<endl;
	  }
	}
  }
}
void Display_Name(){
	system("cls");
	string names[SIZE];
	cout <<endl;
    cout<<setw(10)<<"ID"<<setw(10)<<"name"<<setw(16)<<"major"<<
 setw(10)<<"level"<<setw(10)<<"T_marks"<<setw(13)<<"grade"<<endl;
	 for (int i = 0; i <SIZE; i++){
	 	names[i]=students[i].Fname;
		 }
    for (int i = 0; i < SIZE - 1; ++i) {
        for (int j = 0; j < SIZE - i - 1; ++j) {
            if (names[j].compare(names[j + 1]) > 0) {
                string temp = names[j];
                names[j] = names[j + 1];
                names[j + 1] = temp;
            }
        }
    }
    for (int j = 0; j <SIZE; j++) {
		for (int i = 0; i < SIZE; ++i) {
           	if (names[j]==students[i].Fname) {
			cout<<"-----------------------------------------------------------------------"<<endl;
	 		cout<< "\t"<< students[i].id<< "\t"<< students[i].Fname<< " "<< 
			 students[i].Lname<< "\t"<< students[i].major<< "\t"<<setw(4)<<
		 	students[i].level<<setw(11)<<students[i].Tmarks<<
			 setw(2)<< "\t"<< students[i].grade<<endl;
	       }
       }
   }	
 }
void Display_Grade(){
		system("cls");
float sort[SIZE]; 
     cout <<endl;
     cout<<setw(10)<<"ID"<<setw(10)<<"name"<<setw(16)<<"major"<<
     setw(10)<<"level"<<setw(10)<<"T_marks"<<setw(13)<<"grade"<<endl;

	for (int i = 0; i <SIZE; i++){
	 	sort[i]=students[i].Tmarks;
		 }
    for (int i = 0; i < SIZE - 1; i++) {
        for (int j = 0; j < SIZE - i - 1; j++) {
            if (sort[j] < sort[j + 1]) {			   
                int temp = sort[j];
                sort[j] = sort[j + 1];
                sort[j + 1] = temp;
            }
        }
    }for (int j = 0; j <SIZE; j++) {
	   for (int i = 0; i < SIZE; i++) { 
      if (sort[j]==students[i].Tmarks) {
			cout<<"-----------------------------------------------------------------------"<<endl;
	 		cout<< "\t"<< students[i].id<< "\t"<< students[i].Fname<< " "<< 
		 students[i].Lname<< "\t"<< students[i].major<< "\t"<<setw(4)<<
  	     students[i].level<<setw(11)<<students[i].Tmarks<<
	     setw(2)<< "\t"<< students[i].grade<<endl;
		}
		
     }
   }
}
void Display_Student(){
		system("cls");
	int num; 
	do{
			cout <<endl;
			cout << "1)To display by id \n";
			cout << "2)To display by name\n";
			cout << "3)To display by grade\n";
			cout << "4)To exit main\n\n";
			cout <<" ~Enter your choice :_";
			cin>>num;
	 if(num==1){
			 Display_Id();
	  }else if(num==2){
			 Display_Name();
	  }else if(num==3){
	  		 Display_Grade();
        }
	}while(num!=4);
}
int main() {
    int choice;
		load();  
   do{
   	 system("cls");
    cout <<endl<< "---------Main Menu---------\n\n";
    cout << "1) Add a new Student Record.\n";
    cout << "2) Edit a Student Record.\n";
    cout << "3) Delete a Student Record.\n";
    cout << "4) Search for a Student\n";
    cout << "5) Display All Student Records.\n";
    cout << "6) Exit.\n\n";
    cout <<" ~Enter your choice :_";
        cin>>choice;
        switch (choice){
            case 1:
                Add_Student();
                break;
            case 2:
               Edit_Student();
                break;
            case 3:
             Delete_Student();
                break;
            case 4:
             search_Student();
                break;
            case 5:
                Display_Student();
                break;
            case 6:
                cout <<setw(20)<< "Exiting the program.\n";
                break;
        }
 } while (choice !=6);
    return 0;
}