foo.c: In function 'maximum':
foo.c:5:12: warning: unused variable 'b' [-Wunused-variable]
    5 |     int i, b = 0;
      |            ^
foo.c: In function 'main':
foo.c:14:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   14 |     scanf("%d%d", &n1, &n2);
      |     ^~~~~~~~~~~~~~~~~~~~~~~
foo.c:16:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   16 |         scanf("%d", &a[i]);
      |         ^~~~~~~~~~~~~~~~~~
foo.c:18:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   18 |         scanf("%d", &b[i]);
      |         ^~~~~~~~~~~~~~~~~~

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