如何在c中重复函数体

So I am making this program and I am almost done. However, before I finish I need to make a body function repeat n times and print that answer. For example when iterated once, a string of 'duiolkjgvc' goes into this function and then becomes 'fghiwuegfvw'. Or if iterated twice, the 'fghiwuegfvw' will become whatever I coded in that function and so on. So I am making this program and I am almost don