include <iostream>
#include "main.h"
#include <string.h>
#include <stdio.h>
#include <time.h>
#include <fstream>
using namespace std;
/* run this program using the console pauser or add your own getch,
system("pause") or input loop */
int main(int argc, char** argv) {
int outerChoice = 0;
while(outerChoice!=9){
system("cls");
cout<<"\n Library Management Version 1.0 \n\n";
cout<<"\n1. Amin";
cout<<"\n2. User";
cout<<"\n9. Exit";
cout<<"\n\nEnter your choice : ";
cin>>outerChoice;
if( outerChoice == 1 )
{
char adminUser[10];
char adminPassword[10];
system("cls");
cout<<"\n ---------- Admin Login -------";
cout<<"\n\n Enter username: ";
cin>>adminUser;
cout<<"\n Enter password:";
cin>>adminPassword;
if( (strcmp(adminUser, ADMINUSER) == 0) &&
( strcmp(adminPassword, ADMINPASSWORD) == 0)){
getchar(); getchar();
system("cls");
int innerChoice = 0;
while(innerChoice != 9){
cout<<"\n\n Admin Login is Successful !! Press any key to continue..";
cout<<"\n1. Add Book";
cout<<"\n2. Update Book";
cout<<"\n3. Delete Book";
cout<<"\n4. List of All Books";
cout<<"\n9. Exit";
cout<<"\n\n Enter your choice : ";
cin>>innerChoice;
switch(innerChoice){
case 1: addBook(); break;
case 2: updateBook(); break;
case 3: deleteBook(); break;
case 4: listOfAllBooks(); break;
default: cout<<"\n\n Invalid Choice. Press any key to continue..";
getchar();
}
system("cls");
}
}
else
{
cout<<"\n\n Error : Invalid Credentials. Press any key to conitnue";
getchar();getchar();
}
}
else if(outerChoice ==2) {
char studentUser[10];
char studentPassword[10];
system("cls");
cout<<"\n ---------- Student Login -------";
cout<<"\n\n Enter username: ";
cin>>studentUser;
cout<<"\n Enter password:";
cin>>studentPassword;
if( (strcmp(studentUser, USER) ==0) &&
(strcmp(studentPassword, USERPASSWORD) == 0)){
int innerChoice = 0;
while(innerChoice != 9){
system("cls");
cout<<"\n1. Borrow a Book";
cout<<"\n2. Return a Book";
cout<<"\n3. List of All Books";
cout<<"\n9. Exit";
cout<<"\n\n Enter your choice : ";
cin>>innerChoice;
switch(innerChoice){
case 1: borrowBook();break;
case 2: returnBook();break;
case 3: listOfAllBooks(); break;
case 9: break;
default: cout<<"\n\n Error: Invalid Choice. Press any key to continue..";
getchar();getchar();
}
}
system("cls");
}
else
{
cout<<"\n\n Error : Invalid Credentials. Press any key to conitnue";
getchar();getchar();
}
}
else if(outerChoice!=9){
cout<<"\n\n Invalid choice. Press any key to continue..";
getchar();getchar();
}
else
{
cout<<"\n\n Thank you for using it !! Press any key to exit";
getchar();getchar();
}
}
return 0;
}
int addBook(){
int bookid;
char bookname[20];
char bookauthor[20];
int year, month, day;
time_t t = time(NULL);
struct tm tm = *localtime(&t);
year = tm.tm_year + 1900;
month = tm.tm_mon +1;
day = tm.tm_mday;
system("cls");
cout<<"\n ---- Add a new Book ----";
cout<<"\n\n Enter 4 digit numberic id :";
cin>>bookid;
cout<<"\n Enter book name : ";
cin>>bookname;
cout<<"\n Enter book author : ";
cin>>bookauthor;
char filename[20];
sprintf(filename,"%d%s",bookid,".dat");
ofstream file(filename);
file<<bookname<<"\n";
file<<bookauthor<<"\n";
file<<year<<"\n";
file<<month<<"\n";
file<<day<<"\n";
file.close();
cout<<"\n File Saved Successfully !!";
getchar(); getchar();
}
int deleteBook(){
}
int updateBook(){
}
int listOfAllBooks(){
}
int borrowBook(){
}
int returnBook(){
}
int adminLogin(){
}
int userLogin(){
}
[09:17, 1/11/2021] Ankita Patil: /--------------- End of Main.cpp -----------/
[09:17, 1/11/2021] Ankita Patil: --------------- End of Main.cpp -----------*/
/* ---------------- main.h ----------------- */
#define ADMINUSER "admin"
#define ADMINPASSWORD "admin123"
#define USER "user"
#define USERPASSWORD "user123"
#define FINE 500
int addBook();
int deleteBook();
int updateBook();
int listOfAllBooks();
int borrowBook();
int returnBook();
int adminLogin();
int userLogin();
/* - -------------------- end of main.h -----------------*/
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OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.
#include <iostream>
#include <string>
using namespace std;
int main()
{
string name;
cout << "Enter name:";
getline (cin, name);
cout << "Hello " << name;
return 0;
}
C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
if(conditional-expression) {
//code
}
else {
//code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression){
case value1:
// code
break; // optional
case value2:
// code
break; // optional
......
default:
code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement){
//code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.
return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
// code
}