/in/foo.c: In function 'fn':
/in/foo.c:5:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i=1;i<=n;i++)
     ^~~
/in/foo.c:8:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   printf("%d",sum);
   ^~~~~~
/in/foo.c:4:9: warning: unused variable 'm' [-Wunused-variable]
     int m,sum=0;
         ^