Calculation of sine values in C

[jhamb]

I have to complete a task related to calculation of Sine values.
I made whole of the program but the first value Im getting, i.e. a * Sin(0), is always displayed as 10 rather than 0.

This is the loop code I tried :

//All the values a,f,fs.... are of float type.           
	for(n = 0;n <= N-1; n++)
	{
		double *s = malloc(sizeof(double));
		double *x = malloc(sizeof(double));
		*x = (2 *  PI  * (f / fs)* n);         
               *s = a * sin(*x);
		printf("%f\n",*s);
	}

Anyone can help...!
Thanks :):):)

[weaknessforcats]

Beats me. sin(0) is 0. 0 times anything is 0.

[jhamb]

Beats me. sin(0) is 0. 0 times anything is 0.

Yeah..!! That is what I know. But everytime it came out to be 10 instead 0..
So, I posted... I found a bug in the code, just above the loop.
That was printing an extra 1 before 0....

Now its done with full accuracy..! :))