題目:FizzBuzz
從stdin得到數字N(<10^7),然後從打印出從1到N的數字,輸出到stdout,如果數字是3的倍數的話就只打印“Buzz”,如果數字是5的倍數的話就只打印“Fizz”,如果數字同時是3和5的倍數的話就打印“FizzBuzz”.
例如輸入爲15時,輸出爲:
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
我當時提交的java代碼爲:
import java.util.*;
public class Solution {
public static void main(String args[] ) throws Exception {
/* Enter your code here. Read input from STDIN. Print output to STDOUT */
Scanner in = new Scanner(System.in);
int n = in.nextInt();
for(int i=1; i<=n; i++) {
if(i % 15 == 0) {
System.out.println("FizzBuzz");
}
else if(i % 3 == 0) {
System.out.println("Fizz");
}
else if(i % 5 == 0) {
System.out.println("Buzz");
} else {
System.out.println(i);
}
}
}
}
最近寫scala比較多,看着if,else if很鬧心,於是過後又改了一個更簡潔的版本:
import java.io.*;
import java.util.*;
public class CodingProblem2 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
for(int i = 1; i <= n; i++) {
String output = "";
if (i % 3 == 0) output = "Fizz";
if (i % 5 == 0) output += "Buzz";
if (output == "") output = Integer.toString(i);
System.out.println(output);
}
}
}