Question

Write a program that reads a string and outputs the number of lowercase vowels in the string. Your program must contain a function with a parameter of a char variable that returns an int. The function will return a 1 if the char being passed in is a lowercase vowel, and a 0 for any other character. The output for your main program should be:

There are XXXX lowercase vowels in string yyyyyyyyyyyyyyyyyyyyyy

Where XXXX is the count of lowercase vowels and yyyyyyyyyyyyyyyyyy is the string entered by the user.

Here is the original code for Exercise 22:

#include <iostream>
#include <string>

using namespace std;

void countVowels(string str, int& aCt, int& eCt, int& iCt,
                 int& oCt, int& uCt);

int main()
{
    string inputString;

    int aCount = 0;
    int eCount = 0;
    int iCount = 0;
    int oCount = 0;
    int uCount = 0;

    cout << "Enter a string: " << endl;
    getline(cin, inputString);

    countVowels(inputString, aCount, eCount, iCount, oCount, uCount);
   
    cout << "The number of a's: " << aCount << endl;
    cout << "The number of e's: " << eCount << endl;
    cout << "The number of i's: " << iCount << endl;
    cout << "The number of o's: " << oCount << endl;
    cout << "The number of u's: " << uCount << endl;

    return 0;
}

void countVowels(string str, int& aCt, int& eCt, int& iCt,
                 int& oCt, int& uCt)
{
    for (unsigned int i = 0; i < str.length(); i++)
        switch (str.at(i))
        {
        case 'a':
                aCt++;
                break;
        case 'e':
                eCt++;
                break;
        case 'i':
                iCt++;
                break;
        case 'o':
                oCt++;
                break;
        case 'u':
                uCt++;
    }
}

C++ program- thank you

Answer 1

#include <iostream>
#include <string>

using namespace std;

void countVowels(string str, int& aCt, int& eCt, int& iCt,
                 int& oCt, int& uCt);
int checkvowel(char ch);
int main()
{
    string inputString;

    int aCount = 0;
    int eCount = 0;
    int iCount = 0;
    int oCount = 0;
    int uCount = 0;
    int vowelcount=0;
    int count=0;
    cout << "Enter a string: " << endl;
    getline(cin, inputString);

    countVowels(inputString, aCount, eCount, iCount, oCount, uCount);
      for (unsigned int i = 0; i < inputString.length(); i++)
      vowelcount += checkvowel(inputString.at(i));
      if(aCount>0)
      count++;
      if(eCount>0)
      count++;
      if(iCount>0)
      count++;
      if(uCount>0)
      count++;
    cout<< "There are "<<count<< " lowercase vowels in string "<<inputString<<endl;
   cout<< " Where "<<vowelcount<<" is the count of lowercase vowels and " <<inputString<<" is the string entered by the user."<<endl;
  
    return 0;
}

int checkvowel(char c)
{
    
        switch(c)
        {
        case 'a':
                return 1;
                break;
        case 'e':
           return 1;
              
                break;
        case 'i':
                 return 1;
                break;
        case 'o':
                 return 1;
                break;
        case 'u':
                return 1;
        default : return 0;
               
       }
     
return 0;

}
void countVowels(string str, int& aCt, int& eCt, int& iCt,
                 int& oCt, int& uCt)
{
    for (unsigned int i = 0; i < str.length(); i++)
        switch (str.at(i))
        {
        case 'a':
                aCt++;
                break;
        case 'e':
                eCt++;
                break;
        case 'i':
                iCt++;
                break;
        case 'o':
                oCt++;
                break;
        case 'u':
                uCt++;
    }
}