Update core_voltage.cpp

cpp/core_voltage.cpp

@@ -0,0 +1,45 @@
+#include <iostream>
+#include <cstdio>
+#include <cstdlib>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+    double voltage = 0.0, current_voltage = 0.0;
+    char buffer[128];
+
+    while (1)
+    {
+        // Open Pipe to get output
+        FILE *pipe = popen("echo \"scale=2; $(rdmsr 0x198 -u --bitfield 47:32)/8192\" | bc", "r");
+
+        // Check if Pipe is open
+        if (!pipe)
+        {
+            std::cout << "Error executing command" << std::endl;
+            // return -1;
+        }
+        else
+        {
+            // Read from Pipe
+            while (!feof(pipe))
+            {
+                fgets(buffer, sizeof buffer, pipe);
+            }
+
+            current_voltage = atof(buffer);
+            if (current_voltage > voltage)
+            {
+                std::cout << "Current Max Core Voltage: " << current_voltage << "V" << std::endl;
+                voltage = current_voltage;
+            }
+        }
+        pclose(pipe);
+
+        // std::cout << buffer << std::endl;
+
+        // Wait for one second
+        sleep(1);
+    }
+    return 0;
+}