Reveerse a String in Char Array

#include <iostream>
using namespace std;

void reverseString(char str[], int n) {
    int s=0;
    int e=n-1;
    while(s<e){
        swap(str[s++], str[e--]);
    }
}


int getLength(char arr[]){
    int count= 0;
    for(int i=0; arr[i]!='\0'; i++){
        count ++;
    }
    return count;

}


int main() {
    system("CLS");
    char ch[20];
    cout << "Enter your name: ";
    cin >> ch;
    int length=getLength(ch);
    reverseString(ch, length);

    cout << "\nReverse String is: " << ch;
    return 0;
}

//Happy learning