lvalue required as increment operand

Question

gcc 4.4.4

What am I doing wrong?

char x[10];
char y[] = \"Hello\";
while(y != NULL)
    *x++ = *y++;

Many thanks for any advice.

Answer 1

char x[10];
char y[] = "Hello";
char *p_x = &x[0];
char *p_y = &y[0];
while(*p_y != '\0') *p_x++ = *p_y++;

Since you can't modify the array addresses (done by x++ and y++ in your code) and you can modify the pointer address, I copied over the address of the array into separate pointers and then incremented them.

If you want, I'm sure you can reduce the notation, but I hope you got the point.