#include <iostream>
#include <cmath>
using namespace std;
void print_hello(int x){//формальний параметр
cout<<"Hello "<<x<<endl;
}
double add(double x){
x=x+1;
return x;
}
int main() {
// your code goes here
double y=4;
double z=add(y);
cout<<z<<" "<<y;
//cout<<sin(0)<<endl;
//for (int i=0;i<10;i++) print_hello(5);//тут і фактичний
return 0;
}
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