检查C中的空白程序无法正常工作

I am trying to check for sequential whitespace in a file full of characters. I want my program to ignore more than 1 whitespace after a sequence of characters. Also, a tab will be replaced for a whitespace. I am opening a file and reading it, so don't worry about that part of the code, since it works. My code:I am trying to check for sequential whitespace