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#include <iostream> using namespace std; #include "swap.h" int main(){ int val1 = 10; int val2 = 20; cout << " Before swap:" << endl; cout << " val1:" << val1 << endl; cout << " val2:" << val2 << endl; swap(val1, val2); cout << " After swap:" << endl; cout << " val1:" << val1 << endl; cout << " val2:" << val2 << endl; return 0; }