Dividing X by Y

#include<stdio.h>
int main()
{
    int x,y,n,i;
    double res;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d %d",&x,&y);
        if(y!=0)
        {
            res=(double)x/y;
            printf("%.1lf\n",res);
        }
        else
            printf("divisao impossivel\n");
        x=0;
        y=0;
    }
    return 0;
}