/in/foo.cc: In function 'int main()':
/in/foo.cc:11:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
         for(i=1;i<=2;i++)
         ^~~
/in/foo.cc:15:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
             a[n-2]=a[n-1]+a[n-2];
             ^
/in/foo.cc:6:19: warning: unused variable 'k' [-Wunused-variable]
     int s=0,n,i,j,k;
                   ^