#include <iostream>
#include <cctype>
using namespace std;

int main() {
    int kodeBuku;
    char kodeDiskon;
    string judulBuku;
    int hargaBuku;

    cout << "kode buku: " << endl ;//untuk menunjukkan bahwa nomor yang di input dibawah adalah kode Buku
    cin >> kodeBuku;//memasukkan nilai kode buku
    cout << kodeBuku << endl;//mengeluarkan nilai kode buku yang di input
    cout << " kode diskon : " << endl ;//menunjukkan bahwa nomor yang di input dibawah adalah kode diskon
    cin >> kodeDiskon ;//memasukkan nilai kode diskon
    cout << kodeDiskon << endl ;// mengeluarkan nilai kode diskon yang di input
    if (kodeBuku == 1) {// kondisi satu
        judulBuku = "Belajar Pemrograman";//menunjukkan judul dari buku kondisi 1
        if (kodeDiskon == tolower(kodeDiskon)) {//kondisi 1 ketika kode diskon menggunakan huruf kecil
            hargaBuku = 45000;//jika kondisi 1 tercapai
        } else {//jika tidak menggunakan huruf kecil
            hargaBuku = 50000;//hasil jika tidak tercapai
        }
    } else if (kodeBuku == 2) {//kondisi dua
        judulBuku = "Belajar C++";//menunjukkan judul dari buku kondisi 2 
        if (kodeDiskon == tolower(kodeDiskon)) {//kondisi 2 ketika kode diskon menggunakan huruf besar
            hargaBuku = 65000;//jika huruf yang digunakan huruf besar
        } else {//jika tidak menggunakan hruuf besar
            hargaBuku = 70000;//hasil jika tidak tercapai
        }
    } else {
        cout << "Salah memasukan kode.";//jika kode buku bukan 1 ataupun 2
    }

    cout << "----------------------" << endl;
    cout << "Judul buku: " << judulBuku << endl;
    cout << "Harga buku: " << hargaBuku << endl;

    return 0;
}

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

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;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

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.

2. Switch:

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;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

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 
}

5. Do-While:

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);

Functions

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.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}