謝謝您的回答>< 但輸入後的答案仍然怪怪的Ｑ＿Ｑ

你先確認你讀出來的資料正不正確,
先搞清楚問題出在哪裡,
是讀進來不正確?
還是分析的方法錯誤?

第33列寫錯了,
if (a[i] < b[i]) {
應該是
if (a[i] < b[j]) {才對

import java.util.Scanner;

public class HW3 {

public static void main(String[] args) {

	Scanner input = new Scanner(System.in);
	int[] a = new int[10];
	int[] b = new int[10];
	int[] c = new int[20];
	int aSize = input.nextInt();
	for (int i = 0; i < aSize; i++) {
		a[i] = input.nextInt();
	}
	int bSize = input.nextInt();
	for (int j = 0; j < bSize; j++) {
		b[j] = input.nextInt();
	}

	merge(a, b, c, aSize, bSize);

	for (int k = 0; k < aSize + bSize; k++) {
		System.out.print(c[k] + " ");
	}
}

public static void merge(int[] a, int[] b, int[] c, int aSize, int bSize) {
	int i = 0;
	int j = 0;
	int k = 0;

	while ((i < aSize) && (j < bSize)) {
		if (a[i] < b[j]) {
			c[k++] = a[i++];			
		} else {
			c[k++] = b[j++];			
		}
	}
	while (i < aSize) {
        c[k++] = a[i++];
    }
	while (j < bSize) {
        c[k++] = b[j++];
    }
}
}