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#include<iostream>
using namespace std;
int fun(int a = 0, int b = 0, int c)
{ return (a + b + c); }
int main()
{
cout << fun(2);
return 0;
}
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#include <iostream>
using namespace std;
void f(int &x)
{
x = 3;
}
int main()
{
int x = 2;
f(x);
cout << "The value of x is " << x;
return 0;
}
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