c programming (functions)

Writing a C function a . a . a . a Write a function to take an input integer x and compute its factorial Write a function to take two input numbers and swap them. Write a function to check whether an year is a leap or not Write a function to take two input integer x and n and compute xn Write a function to take the coefficients of polynomial f(x) as an array and real value x and return f(x) Write a set of functions to take an array as input and compute the maximum, minimum, sum , average and standard deviation of the input array Write a set of functions to take a two two-dimensional arrays ( matrices) as input and compute the results of adding, multiplying and dividing element by element the two input materices