[Dev-C++] rand ?

[Randy <hun...@be...>]

This is the era I get what am I doing wrong


 implicit declaration of function `int rand(...)'

#incude <stdio.h>

main()
 {
  int target;
  int guess;
  int again;


 printf("\n Do you want to guess a number 1=3Dyes, 0=3Dno");
 scanf("%d",&again);

  while (again)
  {
  target=3Drand()%100;

printf("\n What is your guess ? ");
scanf("%d",&guess);

  while(target!=3Dguess)
  {
  if(target>guess)printf(" Too low ");
  else printf(" too high ");
  printf("\n What is your guess ? ");
  scanf("%d" ,&guess);
  }

  printf("\n Well done you got it! \n");
  printf("\n Do you want to guess a number 1=3Dyes, 0=3Dno");
  scanf("%d",&again);
   }
}