The program I am trying to finish needs to read in three numbers from the user and then store them in the variables num1, num2 and num3 so that they can be used in steps 2 and 3. The problem I am having is that when the program loops through after the user inputs their numbers and tries to move on to step 2 or 3, it says must complete step 1 first.
This is my code as of right now:
static Scanner console = new Scanner(System.in);
public static void main(String[] args) {
// TODO Auto-generated method stub
int num1;
int num2;
int num3;
int input;
do {
boolean opt1Done = false;
System.out.println("Select your next step");
System.out.println("1: Enter three numbers between 1 and 100.");
System.out.println("2: Order your number in ascending order");
System.out.println("3: Determine if the three inputs form a triangle");
System.out.println("4: Exit");
int answer = console.nextInt();
num1 = console.nextInt();
num2 = console.nextInt();
num3 = console.nextInt();
input = console.nextInt();
if (answer == 1) {
//do whatever for option 1
System.out.println("Enter a value for num1 between 1 and 100.");
System.out.println("Enter a value for num2 between 1 and 100.");
System.out.println("Enter a value for num3 between 1 and 100.");
opt1Done = true;
} else if (answer == 2) {
if (opt1Done) {
//...... do whatever to order the numbers
int[] arraynum;
arraynum = new int[3];
arraynum[0] = num1;
arraynum[1] = num2;
arraynum[2] = num3;
Arrays.sort(arraynum);
int i;
for (i = 0; i < arraynum.length; i++) {
System.out.println("num:" + arraynum[i]);
}
} else {
System.out.println("you must complete Step 1 before Step 2");
}
} else if (answer == 3) {
if (opt1Done) {
//... do whatever to determine if triangle or not
if (num1 + num2 > num3 && num1 + num3 > num2 && num2 + num3 > num1) {
System.out.print("TRIANGLE");
} else {
System.out.print("NO TRIANGLE");
}
} else {
System.out.println("you must complete Step 1 before Step 3");
}
if (answer == 4) {
System.exit(0);
}
}
} while (input != 4);
}
}
Do I need to add another loop or change the one already have?
Move the boolean declaration opt1Done and the numbers outside the loop and read input after every user prompt.
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.Scanner;
public class ReadChar {
public ReadChar() {
// TODO Auto-generated constructor stub
}
static Scanner console = new Scanner(System.in);
public static void main(String[] args) {
// TODO Auto-generated method stub
int num1 = 0;
int num2 = 0;
int num3 = 0;
boolean opt1Done = false;
while (true) {
System.out.println("Select your next step");
System.out.println("1: Enter three numbers between 1 and 100.");
System.out.println("2: Order your number in ascending order");
System.out
.println("3: Determine if the three inputs form a triangle");
System.out.println("4: Exit");
int answer = console.nextInt();
if (answer == 1) {
// do whatever for option 1
System.out.println("Enter a value for num1 between 1 and 100.");
num1 = console.nextInt();
System.out.println("Enter a value for num2 between 1 and 100.");
num2 = console.nextInt();
System.out.println("Enter a value for num3 between 1 and 100.");
num3 = console.nextInt();
opt1Done = true;
} else if (answer == 2) {
if (opt1Done) {
// ...... do whatever to order the numbers
int[] arraynum;
arraynum = new int[3];
arraynum[0] = num1;
arraynum[1] = num2;
arraynum[2] = num3;
Arrays.sort(arraynum);
int i;
for (i = 0; i < arraynum.length; i++) {
System.out.println("num:" + arraynum[i]);
}
} else {
System.out
.println("you must complete Step 1 before Step 2");
}
} else if (answer == 3) {
if (opt1Done) {
// ... do whatever to determine if triangle or not
if (num1 + num2 > num3 && num1 + num3 > num2
&& num2 + num3 > num1) {
System.out.print("TRIANGLE");
} else {
System.out.print("NO TRIANGLE");
}
} else {
System.out
.println("you must complete Step 1 before Step 3");
}
}
if (answer == 4) {
System.exit(0);
}
}
}
}