/in/foo.c: In function 'main':
/in/foo.c:7:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long int *' [-Wformat=]
  scanf("%d %d",&a,&b);
         ~^     ~~
         %ld
/in/foo.c:14:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(k=0;k<=i;k++)
     ^~~
/in/foo.c:17:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   return 0;
   ^~~~~~