fn divide(dividend: usize, divisor: usize) -> usize {
    if (divisor == 0) {
        eprintln!("FLAGRANT SYSTEM ERROR: division by zero");
    }
    dividend / divisor
}
pub fn main() {
    let dividend = 1;
    let divisor = 0;

    println!("infinity = {}", divide(dividend, divisor));
}