Types of operating systems
The three most common operating systems for personal computers are Microsoft Windows, macOS, and Linux.
Answer:
So that the WEB photo will load faster on a website while a PRINT photo needs to look sharper and higher quality in a printed photo or book.
Explanation:
lower resolution = lower quality, load faster
Compared to using a command line, an benefit to using an operating system that employs a GUI exists you do not have to memorize complicated commands.
<h3>What is operating system?</h3>
An operating system (OS) exists as the program that, after being initially loaded into the computer by a boot program, contains all of the other application programs on a computer. The application programs create use of the operating system by completing requests for services through a specified application program interface (API).
A GUI utilizes windows, icons, and menus to carry out commands, such as opening, deleting, and moving files. Although a GUI operating system is especially navigated using a mouse, a keyboard can also be utilized via keyboard shortcuts or arrow keys.
The GUI, a graphical user interface, exists as a form of user interface that permits users to interact with electronic devices via graphical icons and audio indicators such as primary notation, instead of text-based UIs, typed command labels, or text navigation.
Hence, Compared to using a command line, an benefit to using an operating system that employs a GUI exists you do not have to memorize complicated commands.
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Answer:
static int checkSymbol(char ch)
{
switch (ch)
{
case '+':
case '-':
return 1;
case '*':
case '/':
return 2;
case '^':
return 3;
}
return -1;
}
static String convertInfixToPostfix(String expression)
{
String calculation = new String("");
Stack<Character> operands = new Stack<>();
Stack<Character> operators = new Stack<>();
for (int i = 0; i<expression.length(); ++i)
{
char c = expression.charAt(i);
if (Character.isLetterOrDigit(c))
operands.push(c);
else if (c == '(')
operators.push(c);
else if (c == ')')
{
while (!operators.isEmpty() && operators.peek() != '(')
operands.push(operators.pop());
if (!operators.isEmpty() && operators.peek() != '(')
return NULL;
else
operators.pop();
}
else
{
while (!operators.isEmpty() && checkSymbol(c) <= checkSymbol(operators.peek()))
operands.push(operators.pop());
operators.push(c);
}
}
while (!operators.isEmpty())
operands.push(operators.pop());
while (!operands.isEmpty())
calculation+=operands.pop();
calculation=calculation.reverse();
return calculation;
}
Explanation:
- Create the checkSymbol function to see what symbol is being passed to the stack.
- Create the convertInfixToPostfix function that keeps track of the operands and the operators stack.
- Use conditional statements to check whether the character being passed is a letter, digit, symbol or a bracket.
- While the operators is not empty, keep pushing the character to the operators stack.
- At last reverse and return the calculation which has all the results.