37. Same-Named Variables

#include <iostream>
using namespace std;

namespace A { int threshold = 50; }
namespace B { int threshold = 75; }

int main() {
    cout << "A.threshold=" << A::threshold << "\n";
    cout << "B.threshold=" << B::threshold << "\n";
    return 0;
}

Explanation & Logic Summary:

• Two separate namespaces each define a variable with the same name.
• A::threshold and B::threshold disambiguate which one you want.

Layman’s Terms

Think of two folders both having a file called threshold.txt. You must specify the folder name to open the right file.

Firmware Relevance & Real-World Context:

Large firmware bases often have multiple modules (UART, ADC, PWM) that might use common parameter names. Namespaces keep these parameters organized and conflict-free.