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2 years ago

A combination lock has the following basic properties:

Computers and Technology

1 answer:

fomenos2 years ago

5 0

Answer:

public class CombinationLock {

private int combinationNumber1 = 0;

private int combinationNumber2 = 0;

private int combinationNumber3 = 0;

CombinationLock(int combinationNumber1, int combinationNumber2, int combinationNumber3){

this.combinationNumber1 = combinationNumber1;

this.combinationNumber2 = combinationNumber2;

this.combinationNumber3 = combinationNumber3;

}

public boolean open(int number1, int number2, int number3){

if(number1 == combinationNumber1 && number2 == combinationNumber2 && number3 == combinationNumber3)

return true;

else

return false;

}

public boolean changeCombo(int number1, int number2, int number3, int newNumber1, int newNumber2, int newNumber3){

if (open(number1, number2, number3)){

combinationNumber1 = newNumber1;

combinationNumber2 = newNumber2;

combinationNumber3 = newNumber3;

return true;

}else

return false;

}

Explanation:

- Three variables are created to hold the combination.

- A constructor is created to set the combination.

- A boolean method called open is created to check if the given numbers are correct, and returns true (otherwise returns false).

- A boolean method method called changeCombo is created to check if given numbers are correct. If they are correct, it assigns new values for the combination and returns true (otherwise returns false).

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Design a program that asks the user to enter a store’s sales for each day of the week. The amounts should be stored in an array.

sdas [7]

Answer:

Program given below

Explanation:

Total Sales

Assign the values of the variable as “Enter the store sales for Sunday” in Sun

Assign the values of the variable as “Enter the store sales for Monday” in Mon

Assign the values of the variable as “Enter the store sales for Tuesday” in Tue

Assign the values of the variable as “Enter the store sales for Wednesday” in Wed

Assign the values of the variable as “Enter the store sales for Thursday” in Thu

Assign the values of the variable as “Enter the store sales for Friday” in Fri

Assign the values of the variable as “Enter the store sales for Saturday” in Sat

Assign the values for the variable in array as [Sun, Mon, Tue, Wed, Thu, Fri, Sat]

Initialize tot = 0

Use the loop for calculating the total sales for the week,

for total_sales in store_sales:

tot += total_sales

then display the result as,

print "\n Total week sales = %2.f " %tot

sun = int(input("\n Enter the store sales for Sunday: "))

mon = int(input("\n Enter the store sales for Monday: "))

tue = int(input("\n Enter the store sales for Tuesday: "))

wed = int(input("\n Enter the store sales for Wednesday: "))

thu = int(input("\n Enter the store sales for Thursday: "))

fri = int(input("\n Enter the store sales for Friday: "))

sat = int(input("\n Enter the store sales for Saturday: "))

store_sales = [sun, mon, tue, wed, thu, fri, sat]

tot = 0

for store_sale in store_sales:

tot += store_sale

print "\n Total Week Sales: %2.f" %tot

We will have the following output:

OUTPUT 

 Enter the store sales for Sunday: 45

Enter the store sales for Monday: 56

Enter the store sales for Tuesday: 89

Enter the store sales for Wednesday:78

Enter the store sales for Thursday: 45

Enter the store sales for Friday: 12

Enter the store sales for Saturday: 23

Total Week Sales: 348

8 0

3 years ago

Assume that word is a variable of type String that has been assigned a value. Assume furthermore that this value always contains

Valentin [98]

Answer:

String word = "George slew the dragon";

int pos = word.indexOf("dr");

String drWord = word.substring(pos, pos+4);

System.out.println(drWord);

Explanation:

Assuming dr is always there, we don't have to check the validity of 'pos'. Normally, you would!

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3 years ago

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laiz [17]

Answer:

Explanation:

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