foo.c: In function 'FindiSecondMax':
foo.c:10:6: warning: unused variable 'maxpos' [-Wunused-variable]
int maxpos = 0;
^~~~~~
foo.c: In function 'main':
foo.c:43:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &n1, &n2);
^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:47:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &a[i]);
^~~~~~~~~~~~~~~~~~
foo.c:50:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &b[i]);
^~~~~~~~~~~~~~~~~~
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