The correct data structure required to convert infix notation to prefix notation is:

C. Stack

A stack is essential for converting infix expressions to prefix (or postfix) notation. It helps manage the operators and ensures that they are applied in the correct order according to the rules of precedence and associativity. By using a stack, the conversion process becomes efficient and straightforward.

# Rectangle class definition
class Rectangle:
“””
This is a class for Rectangle to calculate the area
Attributes:
length: The length of the rectangle
width: The width of the rectangle
“””
# class attribute shape
shape=”Rectangle”
# constructor to initialize instance variables
def __init__(self,length,width):
self.length=length
self.width=width
# method to calculate and return area
def area(self):
return self.length*self.width
# shapeType() method
def shapeType(self):
print(“Shape type is”,self.shape)

def main():
# create an instance of Rectangle class
r=Rectangle(5,4)
# display class docs
print(Rectangle.__doc__)
# call ShapeType() method
r.shapeType()
# call area() method
print(“Area:”,r.area())
# calling main() function
main()

Code:

#include <iostream>

using namespace std;

int main(void)

{

int choice;

cout<<"\n Silver Express Theme Park Pvt. Ltd.";

cout<<"\n===========================";

cout<<"\n 1.Regular Adult";

cout<<"\n 2. Student";

cout<<"\n 3.Family Ticket";

cout<<"\n Enter the type of ticket which you want: ";

cin>>choice; //input taking

if(choice==1){ //adult tickets total amount calculation
int count;
cout<<"Enter no.of persons:";
cin>> count;
if(count>0)
cout<<"Total amount due is :"<< count*30;
else
cout<<"no.of persons must be greater than zero";
}
else if(choice==2){ //student tickets total amount calculation
int count;
cout<<"Enter no.of persons:";
cin>> count;
if(count>0)
cout<<"Total amount due is :"<< count*25;
else
cout<<"no.of persons must be greater than zero";
}
else if(choice==3){ //family tickets total amount calculation
int count;
cout<<"Number of additional children in the group(more than 2):";
cin>> count;
if(count>0)
cout<<"Total amount due is :"<< (count*15)+75;
else
cout<<"no.of persons must be greater than zero";
}
else{ //invalid option
cout<<"Invalid Option";

}
}