use `sscanf` the same as `istringstream`?

Question

Using istringstream, we could read items one by one from a string, for example:

istringstream iss("1 2 3 4");
int tmp;
while (iss >> tmp) {
    printf("%d \n", tmp);  // output: 1 2 3 4
}

could we do this using sscanf?

Answer 1

You can fairly closely simulate it with this

const char *s = "1 2 3 4";
int tmp, cnt;

for (const char *p = s; sscanf(p, "%d%n", &tmp, &cnt) == 1; p += cnt)
  printf("%d\n", tmp);