foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
6 | scanf("%d",&n);
| ^~~~~~~~~~~~~~
foo.c:9:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
9 | scanf("%d",&a[i]);
| ^~~~~~~~~~~~~~~~~
foo.c:26:7: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
26 | while(r!=0)
| ^
foo.c:21:6: note: 'r' was declared here
21 | int r,t;
| ^
foo.c: In function 'max':
foo.c:26:7: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
26 | while(r!=0)
| ^
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