I am trying to create a program CoordinateFinder.java that asks the user two integer values between 1 and 5. Then, use a pair of for loops to produce a 2D coordinate plane. The plane should print a period for every coordinate on the plane except for the one specified by the user, which should print an X.
Example of what I am trying to do:
Enter your x coordinate:
2
Enter your y coordinate:
4
5 . . . . .
4 . X . . .
3 . . . . .
2 . . . . .
1 . . . . .
0 1 2 3 4 5
What I have:
import java.util.Scanner;
public class CoordinateFinder {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Please enter an X co-ordinate from 1-5: ");
int x = input.nextInt();
System.out.println("Please enter a y co-ordinate from 1-5: ");
int y = input.nextInt();
for (int i = 5; i >= 1; i--) {
System.out.print(i +" ");
if (i == 0) {
System.out.println("\n");
System.out.println(" 5 4 3 2 1 ");
}
for (int j = 4; j >= 0; j--) {
System.out.print(" . ");
if (j == 0) {
System.out.println("\n");
}
}
}
}
}
Which outputs:
5 . . . . .
4 . . . . .
3 . . . . .
2 . . . . .
1 . . . . .
0
5 4 3 2 1
. . . . .
In your nested FOR
loops, the variable i
represents your y
value and variable j
represents your x
value. So on each i
loop you need to print the complete row (y-values) and on each 'j' nested loop you determine what is printed in each column (x-value). To determine if you need to print an X
or a .
you need to compare i
and j
to y
and x
, like so:
import java.util.Scanner;
public class CoordinateFinder {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Please enter an X co-ordinate from 1-5: ");
int x = input.nextInt();
System.out.println("Please enter a y co-ordinate from 1-5: ");
int y = input.nextInt();
System.out.println("");
for (int i = 5; i >= 1; i--) {
System.out.print(i);
for (int j = 1; j <= 5; j++) {
if (i == y && j == x) {
System.out.print(" X");
} else {
System.out.print(" .");
}
}
System.out.print("\n");
}
System.out.println("0 1 2 3 4 5");
}
}
Output:
Please enter an X co-ordinate from 1-5:
2
Please enter a y co-ordinate from 1-5:
4
5 . . . . .
4 . X . . .
3 . . . . .
2 . . . . .
1 . . . . .
0 1 2 3 4 5
Please note that I did reverse the direction of j
in the subloop to represent the increasing x-values as you traverse from left to right on the grid. I left i
decrementing to represent the decreasing y-values as you traverse down the rows. The rest of my changes were formatting.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.