Code: Select all
#include <stdio.h>
char buffer[4]="AAA";
//char buffer[4]={'A','A','A','A'};
void main()
{
printf("0x%02X\n", *buffer); // (1) it does not work
printf("0x%02X\n", (char *) *buffer); // (2) fixed variant
}
If array "buffer" is char array and we try to use it by pointer (1)
then compiler make wrong code without any warning. We may fix it as
wrote (2). Using of int array makes right code. For details you may
see asm-code generated by compiler. For line (1) compiler does not
generate code "ld b,0".
Comment from translator: Do not use %X with char data in printf/sprintf.
You need convert char to int before:
int i = *buffer;
printf("0x%02X\n", i);
