#include <curl/curl.h>
#include <iostream>
#include <string>
#include <vector>

// Callback function for cURL to write the response data to stdout
size_t write_callback(char *ptr, size_t size, size_t nmemb, void *userdata) {
    std::cout << std::string(ptr, size * nmemb);
    return size * nmemb;
}

int main() {
    CURL *curl;
    CURLcode res;

    curl = curl_easy_init();
    if (curl) {
        std::string url = "htt"+"ps://gmrwow.com/api/oauth/token"; // Replace with your URL
        std::string post_fields = "username=sunny&password=ayylmao&grant_type=password"; // Replace with your payload

        // Create a vector to hold the custom headers
        std::vector<std::string> headers;
        headers.push_back("Content-Type: application/x-www-form-urlencoded");
        headers.push_back("Authorization: Basic Z21yOlpwYWtBTzVhQXplNTFhWjRlemE1QXpl"); // Replace with your authorization header
        headers.push_back("User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.3>");
        headers.push_back("Referer: htt"+"ps://gmrwow.com/app/auth/login");
        // Create a cURL header list from the vector
        struct curl_slist *header_list = NULL;
        for (const auto& header : headers) {
            header_list = curl_slist_append(header_list, header.c_str());
        }

        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post_fields.c_str());
        curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long)post_fields.length());
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, header_list); // Set the custom headers
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);

        /* Perform the request, res will get the return code */
        res = curl_easy_perform(curl);

        /* Check for errors */
        if (res != CURLE_OK) {
            std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
        }

        /* always cleanup */
        curl_slist_free_all(header_list);
        curl_easy_cleanup(curl);
    }
    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
}