Question

using c++. ALWAYS GRADE MY ANSWERS

nstructions

Write a program that prompts the user to input an integer and then outputs both the individual digits of the number and the sum of the digits.

For example, it should output the individual digits of:

• 3456 as 3 4 5 6
• 8030 as 8 0 3 0
• 2345526 as 2 3 4 5 5 2 6
• 4000 as 4 0 0 0
• -2345 as 2 3 4 5

#2

Instructions

Write a program that prompts the user to input a sequence of characters and outputs the number of vowels.
(Use the function isVowel written in Programming Exercise 2.)

Your output should look like the following:

There are # vowels in this sentence.

... where # is the number of vowels.

#3

Instructions

You are given a file consisting of students’ names in the following form: lastName, firstName middleName. (Note that a student may not have a middle name.)

Write a program that converts each name to the following form: firstName middleName lastName. Your program must read each student’s entire name in a variable and must consist of a function that takes as input a string, consists of a student’s name, and returns the string consisting of the altered name. Use the string function find to find the index of ,; the function length to find the length of the string; and the function substr to extract the firstName, middleName, and lastName

here is the file:

Miller, Jason Brian
Blair, Lisa Maria
Gupta, Anil Kumar
Arora, Sumit Sahil
Saleh, Rhonda Beth
Spilner, Brody

Answer 1

Screenshot of question1:

The Output Obtained:

The Code Used:

#include<iostream>
using namespace std;
int main()
{
   int k = 0;
   int number;
   int arr[20]; //this array will store the individual digits of the integer.
   int sum = 0;
   cout<<"Enter an integer: "; //asking the user to enter a number.
   cin>>number;
   if(number<0) //if the number is negative we turn it positive by multipling -1.
   {
       number*=-1;
   }
   while(number>0) //we extract each digit from the last and store it in the array.
   {
       arr[k++] = number%10;
       number/=10;
   }
   for(int i=k-1;i>=0;i--) //this array is printing from k-1 to 0 cause the array contains the digits in reverse order.
   {
       cout<<arr[i]<<" "; //printing the digits.
       sum+=arr[i]; //calculating the sum of the sums.
   }
   cout<<endl;
   cout<<"The sum of the digits are: "<<sum<<endl; //printing the sum.
   return 0;
}

The Screenshot Of Question2:

The Output Obtained:

The Code Used:

#include<iostream>
using namespace std;
int isVowel(char ch) //checking if the character is vowel or not and returning 1 or 0 respectively.
{
   if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u'||ch=='A'||ch=='E'||ch=='I'||ch=='O'||ch=='U')
   {
       return 1;
   }
   return 0;
}
int main()
{
   int vowelCount = 0;
   string str;
   cout<<"Enter a string: "; //taking the string a input from the user.
   getline(cin,str);
   for(int i=0;i<str.size();i++) //iterating through the string and counting the numer of vowels.
   {
       if(isVowel(str[i]))
       {
           vowelCount++;
       }
   }
   cout<<"There are "<<vowelCount<<" vowels in this sentence."<<endl; //printing the vowelCount.
   return 0;
}

The Screenshot of Question3:

The Ouput Obtained:

The Code Used:

#include <iostream>
#include <fstream>
#include<string>
using namespace std;
string studentName(string str)
{
   int pos = str.find(","); //we find the position of , and store it in pos variable.
   string lastName = str.substr(0,pos); //next we take the slice of the string before , and store it in lastName string.
   //The line below will take the string slice after the ", " till the end therefore it will
   //contain the first name and the middle name.
   string firstMiddleStr = str.substr(pos+2,str.size()-(pos+2));
   return firstMiddleStr+" "+lastName; //we return the string.
}
int main()
{
   string filename;
   cout<<"Enter the file name: "; //asking the filename from the user.
   cin>>filename;  
   ifstream in(filename); //opening the file.
   if(!in) { //if and error occurs while opening the file.
   cout << "Cannot open input file.\n";
   return 1;
   }
   string line;//this will store the lines in the text file.
   while(getline(in,line)) { //Here we read one line at a time and call the student Name function and print the string.
   cout<<studentName(line)<<endl;
   }
   in.close();
   return 0;
}

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