Function strcmp is used to compare strings. For example, suppose that we have an M-function g = imnorm(f , param) that accepts an image, f , and a parameter param than can have one of two forms: ' norml ' , and ' norm255 ' . In the first instance, f is to be scaled to the range [0, I]; in the second, it is to be scaled to the range [O,255].The output should be of class double in both cases. The following code fragment accomplishes the required normalization: