foo.c: In function 'FindiSecondMax':
foo.c:16:9: warning: variable 'smax' set but not used [-Wunused-but-set-variable]
     int smax=0;
         ^~~~
foo.c:7:9: warning: variable 'max' set but not used [-Wunused-but-set-variable]
     int max=0;
         ^~~
foo.c: In function 'main':
foo.c:34:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n1, &n2);
     ^~~~~~~~~~~~~~~~~~~~~~~
foo.c:36:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ^~~~~~~~~~~~~~~~~~
foo.c:38:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &b[j]);
         ^~~~~~~~~~~~~~~~~~

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