Question

Write a function named squareAndSort(). This function should take a reference to a vector of <double> values. The function should square each of the values in the vector and then sort the vector in ascending order. Since the vector is passed by reference, this function does not need to return anything, so it will be a void function.

Answer 1

#include <iostream>
#include <vector>

using namespace std;

void squareAndSort(vector<double> &v) {
    for (int i = 0; i < v.size(); ++i) {
        v[i] *= v[i];
    }
    double temp;
    for (int i = 0; i < v.size(); ++i) {
        for (int j = 0; j < v.size()-1; ++j) {
            if (v[j] > v[j+1]) {
                temp = v[j];
                v[j] = v[j+1];
                v[j+1] = temp;
            }
        }
    }
}

int main() {
    vector<double> v = {2, 3, 9, 1, 6};
    squareAndSort(v);
    for (int i = 0; i < v.size(); ++i) {
        cout << v[i] << " ";
    }
    cout << endl;
    return 0;
}