changing a string

[tsp120]

I have a situation where I need to take the first 4 characters of a string and change them. Let's say for instance I have these numbers stored in a string:

123456789

What I want to do is take the 1234 and change it to a 4321

Any idea how to do this?

Thanks!

 

[tsp120]

N/M, that was really easy. But I have a related issue. I now need to do the same thing but with the last 4 characters of a string. For the problem mentioned above I just used strncpy, however that just does the first characters of size n. What if I want to do this with middle or end characters?

Thanks again!

 

[Salem]

Pick a position.

These two are equivalent

strncpy( dest, "4321", 4 );
strncpy( &dest[0], "4321", 4 );

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