In C++, please. I will upvote Thank you! only edit from line 8

Lines 1-7 and lines 9- 19 cannot be changed.

This program is supposed to read from an input file and compute the total of the numbers it contains, writing the total to its output file. Fix it so that it works correctly. \( \begin{aligned} 1 & \text { \#include iostream> } \\ 2 & \text { \#include } \\ 3 & \text { using namespace std; } \\ 4 & \\ 5 & \text { int main() } \\ 6 & \{ \\ 7 & \text { ifstream in_file; } \\ 8 & \text { ifstream out_file; } \\ 9 & \\ 10 & \text { in_file.open("input.txt"); } \\ 11 & \text { int total }=0 ; \\ 12 & \text { int } n ; \\ 13 & \text { while (in_file }>>n)\{\text { total }=\text { total }+\mathrm{n} ;\} \\ 14 & \\ 15 & \text { out_file.open("output.txt"); } \\ 16 & \text { out_file }\langle19} return 0; buggy.cpp input.txt 121242