Hello, customer?

Please use ATMega128 (Please see NOTES) as target in Option.In case of any error in the newest version in data room, the newest version of error is not the error in ICCAVR and please add the below. Please write putchar and getchar, internal function fitting the environment in service because this error occurs as it is possible to change so that function of printf and scanf can output to other place depending upon hardware.

- Below ?

#include <stdio.h>

// printf It is required to add when you use // scanf function

int putchar(char c)
{
    while (((UCSR0A>>UDRE0)&0x01) == 0) ;  // UDRE, data register empty
        
    UDR0 = c;
    return c;
}

// It is required to add when you use // scanf function

int getchar(void)
{
    while ((UCSR0A & 0x80) == 0);
    return UDR0;
}