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Library Management System #include<stdlib.h> #include<iostream.h> #include<string.h> #define MAX    100 class bookEntry{ public:     int copies;     char name[30];     char author[30]; }; class library{ public:     int numBooks;     bookEntry database[MAX];     library(){         numBooks = 0;     }     void insertBook( char bookName[], char author[], int c);     void deleteBook( char bookName[]);     bookEntry *search( char bookName[]); }; void library::insertBook( char bookName[], char author[], int c){     strcpy( database[numBooks].name, bookName);     strcpy( database[numBooks].author, author);     database[numBooks].copies = c;     cout << "Book Inserted Successfully.\n";     ++numBooks; } void library::deleteBook( char bookName[]){  ...

Program #include <iostream> #include <string> #include<windows.h> using namespace std; int g=1,l,f=4,n=0; float sum=0; class Student {    int con,sem;     char name[50],DOB[50],section[50]; float gpa; public: void getName() { cin.ignore(); cin.getline(name,50); } void getgpa() { cin >> gpa; } void getDOB() { cin.ignore(); cin.getline(DOB,50); } void getsec() { cin >> section; } void getcon() { cin >> con; } void getsem() { cin >>sem; } void getdata(int k){ cout<<k<<"\t\t"<<name<<"\t\t"<<con<<"\t\t"<<sem<<"\t\t"<<section<<"\t\t"<<gpa<<"\t\t"<<DOB<<endl; } void displayAll() { cout << "Name : " << name << endl; cout << "GPA : " <...

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Program #1 #include<iostream> #include<windows.h> using namespace std; class student{ public: char FirstName[30],LastName[30],SC[20],grade; int RollNo,marks; void CALCULATE_GRADE(){ if(marks>=80) grade='A'; else if(marks>=65&&marks<80) grade='B'; else if(marks>=50&&marks<65) grade='C'; else if(marks>=40&&marks<50) grade='D'; else if(marks<40) grade='F'; } void Display(){ cout<<" First Name:"<<FirstName<<endl;      cout<<" Last Name:"<<LastName<<endl;      cout<<" Roll #:"<<RollNo<<endl;      cout<<" Section:"<<SC<<endl;      cout<<" Marks:"<<marks<<endl;         cout<<" Grade:"<<grade<<endl; } }; int main(...