sprintf format issue

[Peter.J]

Hi,

I am doing a simple thing with string formatting:

sprintf(tmp_str,"%d.%d.%3d", version.major, version.minor, version.patch);

The version structure has values { 0, 5, 1 } and char tmp_str[20]. I want to achieve string like "0.5.001". Instead of getting this format, I am getting "0.5.d". 

For a curiosity I tried to change the format to "%3d.%d.%d" and I got "d.0.5". Format "%d.%d.%d" works as expected - 0.5.1.

I am using SDK 17.0.2 and SES 5.60.

Can somebody advise me how to brush sprintf to work as expected? I am not asking for workarounds how to get the expected string format rather to get sprintf working.

Thanx.

Best regards,

peter

[tedhavelka]

Hi Peter,

If you amend the beginning of your first line of code `sprintf(tmp_str,"%d.%d.%3d" . . .` such that the format string reads `"%d.%d.%03d"` does this give the formatting you seek?

- Ted

[Peter.J]

Hi Ted,

thanx for your feedback. Using "%d.%d.%03d" doesnt make a difference, the output is 0.5.3d.

Best regards,

peter

[ovrebekk]

Hi Peter

Can you try with %.3d instead?

That should pad the number with 0's up to three digits. 

Best regards
Torbjørn

[Peter.J]

Hi Torbjørn,

I tried "%d.%d%.3d" and it gives me 0.53d output.

Best regards,

peter

[ovrebekk]

Hi Peter

The following code seems to work fine for me:

int a = 0;
int b = 5;
int c = 1;
uint8_t testbuf[65];
sprintf(testbuf, "Test %d.%d.%.3d", a, b, c);
printf("%s\r\n", testbuf);

The printed output is this:

Test 0.5.001

Could you try to run the same code?

If it still doesn't work, can you let me know which of the projects in the SDK you are using?
I based my test on the ble_app_uart example. 

Best regards
Torbjørn