C :: Scaling Y Axis - Vertical Histogram

Scaling the yaxis on my histogram for one of my class projects. I've gotten mostly everything but stuck on scaling. I'm pretty sure it's something simple to do, but I'm having trouble, and I've tried everything to my knowledge to get it scaled from 0.1 - 1, like this:

Here is my code:

#include<stdio.h> //include all preprocessor directives
#include<Windows.h>
int main(void) {
int MAX = 0; //initialize and declare variables
int allcounts [10] = {0}; //store an array of integers for
int yaxis, xaxis = 0;

[Code] ....

I'm close, but every time I try and change my y axis in the for loop from 1 going down to 0.1, it doesn't give me a right output.