c++ - Excessive arguments error for recursive reverse string method -

i'm trying program recursive function prints reverse of string, however, compiler keeps saying has many arguments. wrong recursive program?

#include <iostream> using namespace std;  void reversedisplay (const string& s) {      int length=s.size()-1;     if (length==0)         return;      reversedisplay(s, length); }  void reversedisplay (const string& s, int n) {     if(n==1)         cout <<s[n];      else {          cout << s[n];         reversedisplay(s, n-1);     } }  int main() {     string s="12345";     reversedisplay(s);       return 0; } 

try forward declaration:

void reversedisplay (const string& s, int n); 

put before void reversedisplay (const string& s).