padding with sprintf

Question

I have a dummy question. I would like to print an integer into a buffer padding with 0 but I cannot sort it out the sprintfformat. I am trying the following

Answer 1

You got the syntax slightly wrong; The following code produces the desired output:

char buf[31];
int my_val = 324;
sprintf( buf, "%030d", (int)my_val );

From Wikipedia's Article on Printf:

[...] printf("%2d", 3) results in " 3", while printf("%02d", 3) results in "03".