Răspuns :
#include <fstream>
using namespace std;
ifstream fin("datein.txt");
ofstream fout("dateout.txt")
int main()
{
int a;
fin >> a;
fout << a * 10 - a;
return 0;
}
using namespace std;
ifstream fin("datein.txt");
ofstream fout("dateout.txt")
int main()
{
int a;
fin >> a;
fout << a * 10 - a;
return 0;
}