#include <iomanip>
#include <iostream>
using namespace std;
 
int main()
{
    double arr[] = {0.025, -68e-23};
    cout<<arr[0]<<endl;
    cout<<arr[1]<<endl;
    cout<<scientific<<arr[0]<<endl;
    cout<<scientific<<arr[1]<<endl;
    cin.get();
    return 0;
}

0.025
-6.8e-22
2.500000e-02
-6.800000e-22