Answer to Question #182413 in C++ for Mridul

Question

Problem 2: Replace all vowels in sentence by the underscore character.

In this program, you ask user to enter a sentence and read it using string class function getline. Use a for loop to iterate through all characters. Please use str.at(i) method to access each string character. If a character is a vowel, replace it with ’ ’. Both upper and lower case vowels have to be replaced. Those who use an array for string are going to lose points as char.at(i) verifies that the character position in a string is valid. Example run:

Please enter a sentence:

Hello There!

You entered the sentence "Hello There!"

Your sentence after replacing vowels by underscores is H_ll_ Th_r_!

Answer 1

#include <iostream>
#include <string>


using namespace std;


int main(){


	string inputString;
	string outputString;
	cout<<"Please enter a sentence:\n";
	getline(cin,inputString);


	//a for loop to iterate through all characters. 
	// use str.at(i) method to access each string character. If a character is a vowel, replace it with ’ ’. Both upper and lower case vowels have to be replaced. 
	string vowels = "AEIOUY";
	outputString=inputString;
	for (int i = 0; i < inputString.size(); i++){
		for (int j = 0; j < vowels.size(); j++)
		{
			if (toupper(inputString.at(i)) == vowels.at(j))
			{
				outputString.at(i)='_';
				break;
			}else{
				outputString.at(i)=inputString.at(i);
			}
		}
	}
	//display sentence after replacing
	cout<<"You entered the sentence \""<<inputString<<"\"\n";
	cout<<"Your sentence after replacing vowels by underscores is "<<outputString<<"\n";

	system("pause");
	return 0;
}