Bisakah deklarasi mempengaruhi namespace std?

#include <iostream> #include <cmath> /* Intentionally incorrect abs() which seems to override std::abs() */ int abs(int a) { return a > 0? -a : a; } int main() { int a = abs(-5); int b = std::abs(-5); std::cout<< a << std::endl << b << std::endl;...