C :

#include <stdio.h>
int main(){
	int i,n;
	scanf("%d",&n);
	printf("英里\t千米\n");
	for(i=1;i<=n;i++){
		printf("%d\t%.3f\n",i,i*1.609);
	}
	return 0;
}

Java :

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner a=new Scanner(System.in);
	    int n=a.nextInt();
		System.out.println("英里\t千米");
		int miles = 1;
		while (miles <= n) {
			System.out.println(miles + "\t"
					+ String.format("%.3f", miles * 1.609));
			miles++;
		}
	}
}