/in/foo.c: In function 'main':
/in/foo.c:9:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 for(j=w-1;j<n;j++)a[j]=a[j+1];n--;}
 ^~~
/in/foo.c:9:31: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
 for(j=w-1;j<n;j++)a[j]=a[j+1];n--;}
                               ^
/in/foo.c:10:1: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
 printf("%d",x);return 0;
 ^~~~~~~~~~~~~~