foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n1,&n2,&n3);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.c:10:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a1[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c:12:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a2[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c:14:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a3[i]);
   ^~~~~~~~~~~~~~~~~~
foo.c: In function 'Merge':
foo.c:26:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
#'target_mem_ref' not supported by expression#'foo.c: In function 'main':
foo.c:17:4: warning:  may be used uninitialized in this function [-Wmaybe-uninitialized]
    printf("%d",b1[i]);
    ^~~~~~~~~~~~~~~~~~
#'target_mem_ref' not supported by expression#'foo.c:20:4: warning:  may be used uninitialized in this function [-Wmaybe-uninitialized]
    printf("%d",b2[i]);
    ^~~~~~~~~~~~~~~~~~

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