foo.c: In function 'main':
foo.c:19:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
19 | scanf("%d",&n);
| ^~~~~~~~~~~~~~
foo.c:21:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
21 | scanf("%d %d",&b[i],&a[i]);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:26:4: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
26 | k=b[i]*(w/a[i])+k;
| ~^~~~~~~~~~~~~~~~
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