Modify the algorithm that you designed in question 4 so it adds all of the numbers read from the file and displays their total. Write pseudocode that opens an output file with the external name...

Modify the algorithm that you designed in question 4 so it adds all of the numbers read from the

file and displays their total.

Write pseudocode that opens an output file with the external name number_list.dat, but

does not erase the file’s contents if it already exists.