foo.c:2:1: warning: return type defaults to 'int' [-Wimplicit-int]
 main()
 ^~~~
foo.c: In function 'main':
foo.c:14:5: error: expected expression before '}' token
     }
     ^
foo.c:15:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int *' [-Wformat=]
  printf("%d",&a[j]);
          ~^  ~~~~~
          %ls
foo.c:5:12: warning: variable 'n' set but not used [-Wunused-but-set-variable]
  int i,j,m,n;
            ^
foo.c:5:10: warning: unused variable 'm' [-Wunused-variable]
  int i,j,m,n;
          ^
foo.c:8:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&a[i]);
  ^~~~~~~~~~~~~~~~~

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