Count the Number of Vowels Medium Problem Description • Get input value for a string variable using getline(). • Create an integer variable named vowels with initial value 0. • Create a char variable character • Run a loop to access each character of the string. • Inside the loop, convert the string character to lowercase using the tolower() function and store it in the character variable. • Now, check if character is a lowercase vowel or not. • If it is, then increase the value of vowels by 1. • Print the value of vowels outside the loop.

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Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.