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Track and Display Stock Prices Using an API in C Programming

3 min readFeb 5, 2025
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Introduction

In this guide, we will learn how to track and display stock prices using an API in C programming. By leveraging stock market APIs, you can retrieve real-time stock data, such as the current price of a stock, its opening price, and more. We will focus on using a stock price API that allows fetching data in real time.

Objective

The goal of this program is to:

  • Retrieve real-time stock price data from an API.
  • Parse and display the relevant stock information on the screen.
  • Use a simple and effective C program to fetch and show stock prices.

Code

#include #include #include #include <curl/curl.h> #define API_KEY "your_api_key" // Replace with your API key #define STOCK_SYMBOL "AAPL" // Replace with the desired stock symbol // Function to write the response data into a string size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp) { size_t total_size = size * nmemb; strncat(userp, contents, total_size); return total_size; } void get_stock_price(const char *symbol) { CURL *curl; CURLcode res; char url[256]; char response[1024] = ""; // Buffer to store the response // Construct the URL with the stock symbol and API key…

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Aditya Bhuyan
Aditya Bhuyan

Written by Aditya Bhuyan

I am Aditya. I work as a cloud native specialist and consultant. In addition to being an architect and SRE specialist, I work as a cloud engineer and developer.

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