a doubt in sprintf

[rsr]

Hello friends,

I cannot undestand the difference between the following two commands. Infact I want to know exactly what does the number between % and X does in this command.

And what is the significance of 0 before the number, after %.

sprintf( m_szCommand, "TX %01X", 0x0801 );

sprintf( m_szCommand, "TX %04X", 0x0801 );

Assume that I have declared m_szCommand as char m_szCommand[10]

Can any one of you explain this?

thanks in advance
RSR

[RedSon]

Read this:

http://en.wikipedia.org/wiki/Printf

Especially the part about format placeholders.

[horace1]

why don't you write a small program containing these statements and see what they do? Then try changing various things.

[rsr]

why don't you write a small program containing these statements and see what they do? Then try changing various things.

thanks guys..i got it..infact i had written a small program and tried chaging things before but the results were pretty confusing..anyw ays now its clear