From Where Is sprintf Being Loaded?

[rvaessen]

Hello,

I am successfully using the following code:

float f = 23.50
char buffer[10];
sprintf(buffer, "Float = %f\n", f);
SEGGER_RTT_WriteString(0, buffer);

I have two questions:

1. From where is the sprint function being loaded? My project is a copy of one of the ble_peripheral examples. I am building and loading to the pca10028 with Keil uVision 5. I have poked around looking for a linker library include but have not spotted it (I'm still relatively new to uVision)

2. What header file can I include in order to silence the warning: #223-D: function sprint declared implicitly

Thank you.

[Carlos]

Hi, sprintf function resides on the stdio header file, so to fix your warning you should include that header file like so:

#include <stdio.h>

in the file where are you using the sprintf function. For more info you can check [1].

Hope it helps.

[1] www.tutorialspoint.com/.../c_function_sprintf.htm

[Turbo J]

You should fix that buffer overflow.

[rvaessen]

Thx Turbo.

[rvaessen]

Thx, Carlos. That worked. However, I still do not understand from where sprintf and stdio.h are being resolved. I searched the entire Nordic sdk subhierarchy; no stdio.h. Are there a Windows standard c library and a Windows system header search location that Kiel is accessing?

[Carlos]

stdio.h is part of the C standard, it's included on Keil not in the Nordic SDK.