#define clrscr() 100main(){clrscr();printf("%d\n",clrscr());}
main(){char *p="hai friends",*p1;p1=p;while(*p!='\0'){++*p++;}printf("%s %s",p,p1);}
#include‹stdio.h›#define a 10main(){#define a 50printf("%d",a);}
#define a 10main(){#define a 50printf("%d",a);}