C++ problem

(Calculating the Value of pi) Calculate the value of pi from the infinite series pi = 4 - 4/3 + 4/5 - 4/7 + 7/9 - 4/11 + .. Print a table that shows the value of pi approximated by computing the first 200,000 terms of this series. How many terms do you have to use before you first get a value that begins with 3.14159