example2_function_overloading.cpp

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#include <iostream>

void foo(int i) {
    std::cout << "foo(int) called\n";
}

void foo(char* p) {
    std::cout << "foo(char*) called\n";
}

int main() {
    foo(0);        // Calls foo(int)
    foo(nullptr);  // Calls foo(char*)

    return 0;
}