t/problems/increment/ver.c

   1 #include<stdio.h>
   2 #include<stdlib.h>
   3 #include<time.h>
   4 #include<unistd.h>
   5
   6 int main(void){
   7         srand(time(NULL));
   8         for(int i=0;i<100;i++){
   9                 int nr = rand() % 100;
  10                 printf("%d\n", nr);
  11                 fflush(stdout);
  12                 int ret;
  13                 scanf("%d", &ret);
  14                 if(ret != nr + 1){
  15                         fprintf(stderr, "bad ret: %d instead of %d", ret, nr + 1);
  16                         return 1;
  17                 }
  18         }
  19
  20         if(write(4, "20", 2) == -1)
  21                 perror("write");
  22         return 0;
  23 }