I'm trying to create an integer (maximum four digits to string). Here is my method:

char *ToInt( int Value) { char buffer[4]; sprintf(buffer, "%04d", Value); return buffer; } 

After that the string is separeted to each byte and send it into a 7 segment LCD. The problem is that i'm taking a warning

 warning: (365) pointer to non-static object returned 

and also all of this errors

 C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:538: warning: (373) implicit signed to unsigned conversion C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:541: warning: (373) implicit signed to unsigned conversion C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:1259: warning: (373) implicit signed to unsigned conversion C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:1305: warning: (373) implicit signed to unsigned conversion C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:1306: warning: (373) implicit signed to unsigned conversion C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:1489: warning: (373) implicit signed to unsigned conversion C:\Program Files (x86)\Microchip\xc8\v1.45\sources\common\doprnt.c:1524: warning: (373) implicit signed to unsigned conversion