Can I copy a string in an empty string?

Question

Suppose I do like this to copy the string.

char str[] = \"\";
char *str2 = \"abc\";
strcpy(str, str2);
printf(\"%s\", str);  // \"abc\"
printf(\"%d\", strlen(str         


        

Answer 1

It actually gives you undefined behavior, but your program doesn't have to fail because of that. That's how undefined behavior works.