Basic C problem

4. PI Approximater The value of can be expressed by the following infinite series: 3 5 7'9 13 An approximation can be made by taking the first n terms of the series. For n 4, the approximation is 1x | |--+ ) = 2.8952 Write a program that promotes user for the value of n and outputs an approximation of T according to the series above. n should be an integer greater than 0. Enter the values of n: 4 The approximation of Pi is: 2.8952