text: #include "types.h"
  #include "stat.h"
  #include "user.h"
  #include "fcntl.h"
  
  int main(int argc, char *argv[]){
      if(argc!=3) 
      	printf(2,"input format: setp pid priority\"");
      else if(atoi(argv[2]) < 0 || atoi(argv[2]) > 100)
      	printf(2,"Invalid Priority value\n");
      else
      	cpr(atoi(argv[1]),atoi(argv[2]));
      exit();
  }