新・明解Java入門　演習6-18

En06_18.java

import java.util.Scanner;

public class en06_18 {

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

		int[][] c;

		// 行数を入力させる
		System.out.print("行数を入力して下さい：");
		int n = stdIn.nextInt();
		c = new int[n][];
		System.out.println();

		System.out.println("各行の列数を入力して下さい。");
		for (int i = 0; i < c.length; i++) {
			System.out.printf("c[%d] =", i);
			int t = stdIn.nextInt();
			c[i] = new int[t];
		}
		System.out.println();

		System.out.println("各要素数を入力して下さい。");
		for (int i = 0; i < c.length; i++) {
			for (int j = 0; j < c[i].length; j++) {
				System.out.printf("c[%d][%d] =", i, j);
				c[i][j] = stdIn.nextInt();
			}
			System.out.println();
		}
		System.out.println();

		System.out.println("結果を表示");
		for (int i = 0; i < c.length; i++) {
			for (int j = 0; j < c[i].length; j++) {
				System.out.printf("%3d ", c[i][j]);
			}
			System.out.println();
		}
	}
}