Introduction - If you have any usage issues, please Google them yourself
Write a function fun, its function is to calculate the following series and s = 1+ x+ x ^ 2/2!+ X ^ 3/3!+ ...+ X ^ n/n! and values returned by the function value. For example, when n = 10, x = 0.3, the function value of 1.349859. Note: Some program files PROG1.C file. Do not change main function and other functions in any content, only the braces in the function fun fill a number of statements you write.