need function that finds and replaces the elements <, >, "... and also ç, é...

[Deh. Tom]

is their a function that finds and replaces the elements <, >, "... and also ç, é...

example:

ç becomes ç
< becomes &lt;

So, can I use an existing function for this or do I write one myself?

Where do I find more information...

(I use C++)

Thx tom