#include<iostream>
#include<cctype>
using namespace std;
void stringupper(char*&);

int main( )
{char s[]="hellonotredame";
 char *p1(s);
 cout << p1 << endl;
 stringupper(p1);
 cout << p1 << endl;
 return 0;
}

void stringupper(char* &p)
{
 while(*p)
  { *p = toupper(*p);
    p++;
  }
}