[goT]

int Xdata[100] = {100};
How to add Guassian noise with variance Var to Xdata?
.

[coderzone]

Can you clarify a bit more on what you want to be doing with the variable and what is Var ...

[shabbir]

Please read Before you make a query thread so that you know what you are asking can be understood by the other people.

[goT]

maybe to print it to screen or display it. Var is variance = 0.8, for example.

[shabbir]

How to Generate White Gaussian Noise probably can help you. What I found there is

   X=0
   for i = 1 to N
      U = uniform()
      X = X + U
   end

uniform is uniform random number generator between 0 and 1.