/in/ex1.c: In function 'main':
/in/ex1.c:5:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
 for (i=1;i<argc;i++)
 ^~~
/in/ex1.c:7:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     return 0;
     ^~~~~~