Purpose: The purpose of this project is to help the students to reinforce the kn

Question

Purpose: The purpose of this project is to help the students to reinforce the knowledge from Chapter 8 of the textbook. Objectives: 1. Review the top-down design 2. Understand and apply string methods, such as length, operator [], etc 3. Understand and apply functions in cctype library 4. Understand and apply vector methods, such as push_back, at, operator [], etc Problem Description: The project will solve two problems. Problem 1: The program will ask the user to enter a sequence of scores between 0 and 100, inclusive. The program then will print out the stats about these scores, including: the number of scores, the maximum score, the minimum score and the average score. Requirements for Solution to Problem 1: The students should implement the following two functions to solve this problem. void get_scores(vector &v); // get integer scores from keyboard and store in v. // we assume that the user will input scores in range // of 0 to 100, inclusive. User enter a negative // number to stop the input and end the function void print_stats(vector &v); // print out the stats of data that are stored in v // includes: max, min, total number of data, // and the average Problem 2: The program will ask the user to enter a sentence. The program will then display a message to indicate if this sentence is a palindrome. The following sentence is a palindrome: A nut for a jar of tuna. The white space and non English letters are not counted. The case difference is ignored. Requirements for Solution to Problem 2: The students should implement the following function to solve this problem bool is_palindrome(string sentence); // return true if the sentence is a palindrome; // false otherwise

Explanation / Answer

#include<iostream>
#include<string>
#include<vector>

using namespace std;

void get_scores(vector<int> &v){
    int input;
    cout << "Enter scores (to stop enter a negative score) ";
    do{
       cin >> input;
       if (input >= 0)
          v.push_back(input);
    } while (input >= 0 );
}

void print_stats(vector<int> &v){

    int max;
    int min;
    int sum;
    double avg;
   
    max = v.at(0);
    min = v.at(0);

    sum = 0;
    for (int i = 0; i<v.size(); i++){
        if (max < v.at(i))
           max = v.at(i);
        if (min > v.at(i))
           min = v.at(i);
        sum = sum + v.at(i);
    }
    cout << "Count: " << v.size() << endl;
    cout << "Maximum: " << max << endl;
    cout << "Minimum: " << min << endl;
    cout << "Average: " << sum/v.size() << endl;

}

void check_palindrome(){

    string line;
    string data1, data2;

    data1 = "";
    data2 = "";
    getline(cin,line);
    cout << "Enter the sentence ";
   
    getline(cin,line);

    for(int i=0; i<line.size(); i++){
       if (isalpha(line.at(i))){
         
          data1 = data1 + (char)tolower(line.at(i));
       }
    }
    for(int i=line.size()-1; i>=0; i--){
       if (isalpha(line.at(i)))
          data2 = data2 + (char)tolower(line.at(i));
    }
    if (data1 == data2){
        cout << "It is a palindrome ";
    }    
    else {
        cout << "It is not a palindrome ";
    }

}

int main(){

   vector<int> v;
   get_scores(v);
   print_stats(v);
   check_palindrome();
   return 0;
}

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