C++ ::  pass Parameters From Other Application To Replace String Within Text File Before Execute Registry Merge

I'm creating simple console application using Code::Blocks to allow me to pass parameters from other application to replace string within text/registry file before execute the registry merge. Passing parameters to console already success. Now I only have problem with reading file. Example of first line in the registry file is as below.

Windows Registry Editor Version 5.00

However when read into string and output to console using 'cout', it will be show as below with spaces in between.

W i n d o w s R e g i s t r y E d i t o r V e r s i o n 5 . 0 0

Below is my code.

ifstream f("install.reg");
string s((istreambuf_iterator<char>(f)), istreambuf_iterator<char>());
cout << s;