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#include using namespace std; void swap 1 ( int a , int b ) { int t = a; a = b; b = t;
#include
using namespace std;
void swapint a int b
int t a;
a b;
b t;
void swapint& a int& b
int t a;
a b;
b t;
int main
int n m ;
swapn m;
cout n n m m endl;
swapn m;
cout n n m m endl;
return ;
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