Question

In C++

1.Define a function named "sumCodes" that accepts two input parameters: "s "and "pos". "s" is an object of the type "string" and "pos" is a boolean value with the default argument of "true". If "pos" is "true", the function returns the summation of the ASCII codes of all the characters located at the even indices of "s" and if "pos" is "false", the function returns the summation of the ASCII codes of all the characters located at the odd indices of "s" . For example, if the caller sends the values of "ABCD" and "true" to the function respectively for the parameters "s" and "pos", the function returns 132 (i.e. 65 (the ASCII code of 'A') + 67 (the ASCII code of 'C')). If the function is called by the values of "ABCD" and "false" respectively for the parameters "s" and "pos", the function returns 134 (i.e. 66 (the ASCII code of 'B') + 68 (the ASCII code of 'D')).

2.Write a program that reads a string from the keyboard and generates a random integer in the range [0, 1]. If the random integer generated is 0, the program calls the "sumCodes" function to calculate the summation of the ASCII codes of the characters located at the odd indices of the input string, and if the random integer generated is 1, the program calls the "sumCodes" function to calculate the summation of the ASCII codes of the characters located at the even indices of the input string and displays the result on the screen.

Answer 1

C++ code for above problem

#include<iostream>
#include<time.h>
using namespace std;

int sumCodes(string str,bool pos)
{
    int sum=0;
    for(int i=0;i<str.length();i++)
    {
        char ch=str.at(i);
        if(i%2==pos)
        {
            sum+=ch;
        }
    }
    return sum;
}

int main()
{
    string str;
    cout << "Enter a string: ";
    cin >> str;
    srand(time(NULL));
    bool pos=rand()%2==0 ? false : true;
  
    cout << endl;
    cout << "Entered string: " << str << endl;
    cout << "Position value: " << pos << endl;
    cout << "Value returned by SumCodes() is: " << sumCodes(str,pos) << endl;
    return 0;
}

Sample output

Enter a string: ABCD Entered string: ABCD Position value: 0 Value returned by Sumcodes() is: 132

Mention in comments if any mistakes or errors are found. Thank you.