foo.c: In function 'main':
foo.c:8:29: error: 'a' undeclared (first use in this function)
    8 |                 scanf("%d",&a[i]);
      |                             ^
foo.c:8:29: note: each undeclared identifier is reported only once for each function it appears in
foo.c:12:33: error: expected expression before 'int'
   12 |                                 int temp=a[j],a[j]=a[j+1],a[j+1]=temp;
      |                                 ^~~

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