How to generate random number in gaussian distribution?

[Man4ish]

How to generate random number in normal distribution without using any external library. I found few methods implementing
it. But all use GSL or boost. I don't want to use any third party library. Thanks in advance.

[donbock]

rand (with srand) from <stdlib.h> approximates a uniform distribution. Have you investigated any of the algorithms that derive a standard distribution from uniformly distributed values (see Normal distribution).

Another place to look is the Gnu Scientific Library (GSL).

[emaghero]

The text "Numerical Recipes in C" contains a chapter on random number generation. The chapter describes the techniques used to create random numbers from distributions. It also includes C source code.