foo.c: In function 'main':
foo.c:5:9: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(a<b&&b<c||c<b&&b<a)
      ~~~^~~~~
foo.c:7:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  else if(b<a&&a<c||c<a&&a<b)
          ~~~^~~~~
foo.c:4:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&a,&b,&c);
   ^~~~~~~~~~~~~~~~~~~~~~~~

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