#include iostreamusing namespace std;int main double num; cin num; coutsetfiosfixed; coutprecision5; cout num endl; coutunsetfiosfixed; coutsetfiosscientific; coutprecision7

The program reads in a double value from the user, sets the output format to display 5 decimal places, and then prints the value in that format. It then changes the output format to scientific notation and displays the value again with 7 digits of precision. Finally, it returns 0 to indicate successful completion.

For example, if the user enters the value 1234.56789, the program will output:

1234.56789 1.2345679e+03

Note that the first output is in fixed notation with 5 decimal places, while the second output is in scientific notation with 7 significant digits