Question

Multi part question c++ and yes I'm going to rate you up thank youu!

Part A

Ask the user to input a string.

Then sort the string in reverse lexicographic order and print it out.

This would be done using the integer values of the characters (ASCII table).

Use any one of the sorting methods.

For example:

if the user enters "zeta" sorting it in reverse lexicographic order would give "ztea".

if the user enters "ZETA" it would give "ZTEA".

Part B

Define a struct for a Circle with a radius, circumference, area.

Then define an array with 10 Circles.

Input the radius for each circle from the user (and also set its circumference, area).

Then output the area of the largest circle in the array.

Answer 1

$\color{blue}\underline{A:}$

#include <string>
#include <iostream>
using namespace std;

int main() {
    string s;
    cout << "Enter a string: ";
    cin >> s;

    char ch;
    for (int i = 0; i < s.size(); ++i) {
        for (int j = 0; j < s.size()-1; ++j) {
            if (s[j] < s[j+1]) {
                ch = s[j];
                s[j] = s[j+1];
                s[j+1] = ch;
            }
        }
    }

    cout << s << endl;
    return 0;
}

$\color{blue}\underline{B:}$

#include <iostream>
using namespace std;

#define PI 3.14159

struct Circle {
    double radius;
    double area;
    double perimeter;
};

int main() {
    Circle circles[10];
    for (int i = 0; i < 10; ++i) {
        cout << "Enter radius of circle " << i+1 << ": ";
        cin >> circles[i].radius;
        circles[i].area = PI * circles[i].radius * circles[i].radius;
        circles[i].perimeter = 2 * PI * circles[i].radius;
    }

    Circle largest = circles[0];
    for (int i = 0; i < 10; ++i) {
        if (circles[i].area > largest.area) {
            largest = circles[i];
        }
    }
    
    cout << "Circle with largest area is of radius " << largest.radius << endl;
    return 0;
}