range.c

#include <stdio.h>
    void main() {
        int i = 0, recid = i = 320;
        int lastRecordId = 0;
        printf(" enter last record id :");
        scanf("%d", & lastRecordId);
        printf("lastRecordId:%d", lastRecordId);
        i = recid;
        while (i > 0) {
            if (i <= lastRecordId && i > (lastRecordId - 300))
                printf("id:%d", i);
            i--;
        }
    }