How to find the biggest random number in specified value in C?

How can I save and print the biggest random number here?

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <time.h>   
void main()
{
  int  i,max=0;

srand(time(NULL));

printf("rand gives value between 1-1000\n");
for (i = 0; i < 30; i++)
{
    printf("%d ", rand() % 1000 + 1);
}
printf("\nMax is %d", max);
getch();
}

Thank you in advance.