Resolve UART Namespaces

#include <iostream>
using namespace std;

namespace Boot{
    namespace UART{
        void send(){cout << "BOOT UART";}
    }
}


namespace App{
    namespace UART{
        void send(){cout << "APP UART";}
    }
}

int main() {
    int mode;
    cin >> mode;

    if(mode == 1){
        Boot::UART::send();
    }
    else if(mode ==2){
        App::UART::send();
    }

    return 0;
}

Solving Approach