C++ Program to find No. of Vowels in String

#include<iostream>

#include<iomanip>

#include<string.h>

using namespace std;

void line()

{

cout<<"========================================\n";

}

int main() 

{

int i,flag=0;

char arr[20];

line();

cout<<"String Programs \n";

line();

cout<<"Enter anything in the String :";

cin.getline(arr,20);

line();

for(i=0;arr[i]!='\0';i++)

{

switch(arr[i])

{

case 97:flag++;break;

case 101:flag++;break;

case 105:flag++;break;

case 111:flag++;break;

case 117:flag++;break;

case 65:flag++;break;

case 69:flag++;break;

case 73:flag++;break;

case 79:flag++;break;

case 85:flag++;break;

}

}

arr[i]='\0';

cout<<"number of vowels :"<<flag;

}