Answer:
Computers affect our lives daily because we use them everyday to browse the internet and solve problems in real life. They help solve problems and without them, getting certain information would be much harder. They help us interact with friends from anywhere in the world and communicate with relatives. It has also helped us during this pandemic and lets us learn from school in the safety of our own home.
( hope this helps, i wrote it myself ;-; )
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.
Answer:
DHCP
Explanation:
The only option can give IP addresses is the DHCP The Dynamic Host Configuration Protocol, because the DNS (Domain Name System) only translates IP addresses to a hostname, and WPS (Wi-Fi Protected Setup) or WPA (Wi-Fi Protected Access) if for security network, doesn't matter if is a wireless router, in a network always DHCP gives the IP addresses.
I think that the answer wiloukd be B. For #31 and for #32 A.
