Retrieve the index of a float number in two differents arrays in c

Hello can you help me to think how I can retrieve a float number in when I change the below arrays into float?I am retrieving the index using to enter an integer number but when I use to change the arrays to float type and enter a float number I am getting errors:
see the code below:
main()
{
// float k[10]={2, 4, 6, 8, 10,12,14,16,18,20};
//int j[10]={3,5,7,9,11,13,15,17,19,21};

const int k[]={10,12,17,22,27,32,37,42,47,52,57,62,67,72,77,82};
const int j[]={13,15,20,24,31,35,40,45,50,55,60,65,70,75,80,85};


int i,t;
int q;
printf("Enter any number Q\n");
scanf("%d",&q);




for(t=0;t<16;t++)
{
for(i=0;i<16;i++)
{

if((q<=j[t])&&(q>=k[t])&&(t==i))
{
printf("%dis present at location %d. \n",q,i+1 );
break;

}
}

}

}

This program operate as follows:when I enter a number for example 14;the index is 2 because 12<=14 and 14,=15;
69;the index is 13 because 67<=69 and 69<=70;
and so on;so what I want is to use float numbers in the above arrays and retrieve the index of that float number using the above structure:

Please help.

Thanks.