P28 - inversare sir de caractere

#include <iostream>
#include <string>
using namespace std;

/** inversare recursiva*/
void inversare(string &s, int start, int end){
    if ( start >= end){
        return ;
    } else {
         char temp = s[start] ;
         s[start] = s[end];
         s[end] = temp;
         inversare(s, start+1, end -1);
    }
}

/** inversare iterativa */
void inversare(string &s){
    int start=0;
    int end = s.length()-1;
    while( start <end){
         char temp = s[start] ;
         s[start] = s[end];
         s[end] = temp;
         start ++;
         end --;
    }
}


int main(){
    string s="abcd";
    inversare(s, 0, s.length()-1);
    cout<<"Inversat:"<<s<<endl;
    inversare(s);
    cout<<"Inversat:"<<s;

}