Hi every one.
When i use printf to print the time, i use ``%6d'' instead of ``%06d''
in code:
printf( "%d.%6d", time_t.second, time_t.milsecond);

so the log is like this now:

time cost is 3.  1234
time cost is 3.   234
time cost is 3.     5
.....

i want to use the regular expression in vim to change all spaces into
``0'',but i can't do this in one operation.

my way is like this:
<esc>:%s/\(\d\.\ *\)\ /\10/g
6g&

is there any way to change all the space into zero after only one
operation?
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