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ofstream outfile("d:\\2.txt");
double data =67.37831
#include <iostream>
#include <string>
using namespace std;
int main()
{
double data =67.37831;
cout.setf(ios::scientific);
cout<<data<<endl;;
return 0;
}
int main()
{
double data =67.37831;
printf("%e", data);
}