Split a file by start and end row.

I have a file which looks something as following, I would like to split to several files, The start and end of each file is 'FILE' and end with 'ASCII... ' .
At the same time for each file in the first column add 100 and also second column add 100 the rest of the column as it is , see example of the result file1 . the name of the file it doesnot matter :

FILE
A header exampe 
this a test example
1000 3000 9000 3200
1100 3000 9100 3200
1200 3100 9200 3200
1300 3200 9300 3200
1200 3050 9400 3200
ASCII file 1
FILE 2
A header exampe
this a test example
1000 3000 8000 3200
4100 4000 8100 3200
5200 6100 8200 3200
1390 5200 8300 3200
1220 3050 8400 3200
ASCII file 2
FILE 3
A header exampe
this a test example
2000 3000 9000 3200
2100 3000 9100 3200
3200 3100 9200 3200
4300 3200 9300 3200
5200 3050 9400 3200
ASCII file 3
.........

The result would be e.g. file 1

file
A header exampe 
this a test example
1100 3100 9000 3200
1200 3100 9100 3200
1300 3200 9200 3200
1400 3300 9300 3200
1300 3150 9400 3200

Any attempts from your side?

---------- Post updated at 20:12 ---------- Previous update was at 20:11 ----------

Howsoever, try

awk ' 
/^FILE/         {if (FN) close (FN)
                 FN="FILE" ++CNT   
                }
                {if     ($1+0 == $1 &&
                         $2+0 == $2)  
                        {$1+=100
                         $2+=100
                        }
                 print > FN
                }
' file
1 Like

Thanks RUdiC it works . regarding "Any attempts from your side?".I have tried. Sorry, I am new to the scripting and I am trying to learn.

Best regards