C++ Assignment 1. Write the function described below: The function is named calc

Question

C++ Assignment

1. Write the function described below:

The function is named calculateTip

It takes in two parameters: one double reference parameter for the price, one double value parameter for the tipping percentage.

It updates the price by multiplying it by 1 + the tipping percentage

It returns nothing.

2. Write the following function:

string frontBack(string str);

//Given a string, return a new string where the first and last chars have been exchanged.

//frontBack("code") "eodc"

//frontBack("a") "a"

//frontBack("ab") "ba"

3. Write the following function:

void squareArray(int array[], int size);

//Given an array of ints, add multiplies each element in the array by itself

//return nothing. Remember arrays are automatically pass by reference

//squareArray([1,2,3],3) -> [1, 4, 9]

//squareArray([3, 5, 6, 8, 9], 5) -> [9, 25, 36, 64, 81]

//squareArray([5], 1) -> [25]

Explanation / Answer

//given the fnctions along with main function to test

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

void calculateTip(double &price, double percentage);
string frontBack(string str);
void squareArray(int arr[], int size);

int main()
{
   double price = 12;
   string str = "code";
   int arr[5] = { 3, 5, 6, 8, 9 };
   calculateTip(price, 5);
   cout << "Price = " << price<<endl;
   cout<<"Calling frontBack: "<<frontBack(str)<<endl;
   cout << "Calling squareArray : ";
   squareArray(arr, 5);
   //print array
   cout << "After squaring array: ";
   for (int i = 0; i < 5; i++)
   {
       cout << arr[i] << " ";
   }
}

void calculateTip(double &price, double percentage)
{
   price *= (1 + percentage/100 );
}
string frontBack(string str)
{
   string newstring = str;
   newstring[0] = str[str.length() - 1];
   newstring[newstring.length() - 1] = str[0];
   return newstring;
}
void squareArray(int arr[], int size)
{
   for (int i = 0; i < size; i++)
   {
       arr[i] = arr[i] * arr[i];
   }
}

----------------------------------------------------------------------------------------------------------------------

//output

Price = 12.6
Calling frontBack: eodc
Calling squareArray : After squaring array: 9 25 36 64 81

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