Multiple Namespaces

#include <iostream>
using namespace std;

namespace UART
{
    int baudRate=115200;
} 

namespace SPI 
{ 
    int clockSpeed=1000000; 
}

int main() {
    cout << "UART Baud: " << UART::baudRate << "\n";
    cout << "SPI Clock: " << SPI::clockSpeed << "\n";
    return 0;
}