c - Rewrite lines on file -


i need rewrite char on file, or delete lines. there way achieve without rewriting whole file?

example: need change char "8" @ line 10 char "4". 

pollo ciao fred 98/98/34 42ddw 4 10 1234567890 cristo ciao liby 98/98/34 fre42ddw 8 20 12345678901234567890

look @ 

int fseek (stream, offset, origin);

you can move specific offset , write symbol there. find offset of char replace still need read symbols before it.


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