// inv.cpp
#include <iostream.h>
void inv(char c[100])
{int i;
 int n = 0;
 while(c[n] != '\0') n++;
 for(i = n; i >= 0; i--)
 cout << c[i];
}
int main()
{
  char ca[100];
  int i = 0;
  char a;
  cout << "scrivi una frase: \n";
  while(cin.get(a))
  {ca[i] = a;
   i++;
  }
  inv(ca);
  return 0;
}