 <style>
    * {
        margin: 0;
        padding: 0;
    }
 
    .navbar {
        display: flex;
        align-items: center;
        justify-content: center;
        position: sticky;
        top: 0;
        cursor: pointer;
    }
 
    .background {
        background: black;
        background-blend-mode: darken;
        background-size: cover;
    }
 
    .nav-list {
        width: 70%;
        display: flex;
        align-items: center;
    }
 
    .logo {
        display: flex;
        justify-content: center;
        align-items: center;
    }
 
    .logo img {
        width: 180px;
        border-radius: 50px;
    }
 
    .nav-list li {
        list-style: none;
        padding: 26px 30px;
    }
 
    .nav-list li a {
        text-decoration: none;
        color: white;
    }
 
    .nav-list li a:hover {
        color: grey;
    }
 
    .rightnav {
        width: 30%;
        text-align: right;
    }
 
    #search {
        padding: 5px;
        font-size: 17px;
        border: 2px solid grey;
        border-radius: 9px;
    }
 
    .firstsection {
        background-color: green;
        height: 400px;
    }
 
    .secondsection {
        background-color: blue;
        height: 400px;
    }
 
    .box-main {
        display: flex;
        justify-content: center;
        align-items: center;
        color: black;
        max-width: 80%;
        margin: auto;
        height: 80%;
    }
 
    .firsthalf {
        width: 100%;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
 
    .secondhalf {
        width: 30%;
    }
 
    .secondhalf img {
        width: 70%;
        border: 4px solid white;
        border-radius: 150px;
        display: block;
        margin: auto;
    }
 
    .text-big {
        font-family: 'Piazzolla', serif;
        font-weight: bold;
        font-size: 35px;
    }
 
    .text-small {
        font-size: 18px;
    }
 
    .btn {
        padding: 8px 20px;
        margin: 7px 0;
        border: 2px solid white;
        border-radius: 8px;
        background: none;
        color: white;
        cursor: pointer;
    }
 
    .btn-sm {
        padding: 6px 10px;
        vertical-align: middle;
    }
 
    .section {
        height: 400px;
        display: flex;
        align-items: center;
        justify-content: center;
        max-width: 90%;
        margin: auto;
    }
 
    .section-Left {
        flex-direction: row-reverse;
    }
 
    .paras {
        padding: 0px 65px;
    }
 
    .thumbnail img {
        width: 250px;
        border: 2px solid black;
        border-radius: 26px;
        margin-top: 19px;
    }
 
    .center {
        text-align: center;
    }
 
    .text-footer {
        text-align: center;
        padding: 30px 0;
        font-family: 'Ubuntu', sans-serif;
        display: flex;
        justify-content: center;
        color: white;
    }
</style>

created 2 years ago

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
}