输出一定数量的偶数

给定一个起始值begin，及一个整数n，输出begin之后（可包含begin）的n个偶数。

c语言

#include
int main() {

    int begin;
    int n;
    scanf("%d%d", &begin, &n);

    int k = 0;
    while(k < n) {

        if (begin % 2 == 0) {
            ++k;
            printf("%dn", begin);
        }

        ++begin;
    }
}

C语言实现二

#include
int main() {

    int begin;
    int n;
    scanf("%d%d", &begin, &n);

    if (n <= 0) {
        printf("0n");
        retrun 0;
    }

    int start = begin % 2 == 0 ? begin : begin + 1;

    for (int k = 1; k <= n; ++k) {
        printf("%dn", start);
        start += 2;
    }
    
}

java 语言实现

package com.suanfa;

import java.util.Scanner;

public class even {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int begin = scanner.nextInt();
        int n = scanner.nextInt();

        begin = begin % 2 == 0 ? begin : begin + 1;

        int k = 1;
        while (k <= n) {

            System.out.println(begin);
            begin += 2;
            k++;
        }
    }
}