This a scr ipt written using C++ to calculate PI value using random points in 1 D circle inside square. Initialise random number generator was used to generate random numbers. The error calculated for each result in the output screen. The scrip is useful to learn and exam generating random values in C++ and check error range. There is also some useful scr ipts to learn basic c++.-This is a scr ipt written using C++ to calculate PI value using random points in 1 D circle inside square. Initialise random number generator was used to generate random numbers. The error calculated for each result in the output screen.　The scrip is useful to learn and exam generating random values in C++ and check error range.　There is also some useful scr ipts to learn basic c++.