CSC110/MultiplicationTable.java at main · Code-Level-Beard/CSC110 · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/*
Program Name :  MultiplicationTable.java
Author :  Joshua Decker
Date : 2/28/2022
Class: CSC110AA/AB and CIS163AA
Description:
		  This program prompts the user for a number 1 - 5,
		  checks for bad input,
		  and creates a multiplication table.
		  Student completes.
*/

package ch5;

import java.util.Scanner;

/* produces a multiplication table of integers */

public class MultiplicationTable {
	public static void main(String[] args)
	{
		int size;
		int value;
		Scanner scan = new Scanner (System.in);

		//read in size of multiplication table
		System.out.print("Please enter the table size from 1 to 5 (0 to quit): ");
		size = scan.nextInt();

		while((size < 0) || (size > 5)) {
			System.out.println("Sorry, not a valid table size from 1 to 5. Try again.");
			System.out.print("Please enter the table size from 1 to 5 (0 to quit): ");
			size = scan.nextInt();
		}

		while ((size > 0) && (size <= 5)) {
			//using a for loop, display the top header row of numbers
			System.out.print("\t");
			for (int horiz = 1; horiz <= size; horiz++)
				{    System.out.print(horiz + "\t");    }

				System.out.println();

				//using a for loop, display the top header row underline (use a dash)
				System.out.print("\t");
				for (int horiz = 1; horiz <= size; horiz++)
					{    System.out.print("-" + "\t");		}

					System.out.println();


					/* using a nested for loop create the rest of the table */
				for (int vert = 1; vert <= size; vert++) {
						System.out.print(vert + ":\t");
						for (int i = 1; i <= size; i++) {
							value = vert * i;
							System.out.print(value + "\t");
						}
						System.out.println();
						}

				System.out.print("Please enter the table size from 1 to 5 (0 to quit): ");
				size = scan.nextInt();

				while ((size < 0) || (size > 5)) {
					System.out.println("Sorry, not a valid table size from 1 to 5. Try again.");
					System.out.print("Please enter the table size from 1 to 5 (0 to quit): ");
					size = scan.nextInt();
				}

				}


		System.out.println("\nDone!");
		}
}

/*
Please enter the table size from 1 to 5 (0 to quit): -1
Sorry, not a valid table size from 1 to 5. Try again.
Please enter the table size from 1 to 5 (0 to quit): 1
	1
	-
1:	1
Please enter the table size from 1 to 5 (0 to quit): 2
	1	2
	-	-
1:	1	2
2:	2	4
Please enter the table size from 1 to 5 (0 to quit): 5
	1	2	3	4	5
	-	-	-	-	-
1:	1	2	3	4	5
2:	2	4	6	8	10
3:	3	6	9	12	15
4:	4	8	12	16	20
5:	5	10	15	20	25
Please enter the table size from 1 to 5 (0 to quit): 4
	1	2	3	4
	-	-	-	-
1:	1	2	3	4
2:	2	4	6	8
3:	3	6	9	12
4:	4	8	12	16
Please enter the table size from 1 to 5 (0 to quit): 0

Done!
*/