hptr=ptr; while (*str != 0) { *ptr++ = toupper(*str++); } *ptr=0; return hptr;
hptr = ptr; while (*str != '\0') *ptr++ = toupper (*str++);  *ptr = '\0'; return hptr;
static char *upcase(const char *str) {    char *ptr, *hptr;    ptr = malloc(strlen(str));    if (ptr == NULL) {	f_print(stderr,"malloc failed\n");	exit(1);    }    hptr=ptr;    while (*str != 0) {	*ptr++ = toupper(*str++);    }    *ptr=0;    return hptr;}