Number generator between 0-100

[peste19]

I created a program which takes a number between 0-100 to calculate probability and i created a module but when i call for it it brings me numbers out of my requested range, please tell me what i am doing wrong,

I have
i=0
h=100

This is my module

double probability (int h, int i)
{
	return ((double) rand () / RAND_MAX) * (h-i) + i;
}

Thanks in advance