remove comments (nested loops)

#include <stdio.h>
#include <stdlib.h>

void skipLineComm() {
  for (char ch; (ch = getchar()) != EOF;) {
    if (ch == '\n') {
      putchar('\n');
      return;
    }

  }
}

void skipBlockComm() {
  for (char ch, last = 0; (ch = getchar()) != EOF; last = ch) {
    if (ch == '/' && last == '*') {
      return;
    }
  }
}

int main(void) {
  for (char ch, last = 0; (ch = getchar()) != EOF; last = ch) {
    if (ch == '/' && last != '/') {
      continue;
    }

    if (ch == '/' && last == '/') {
      skipLineComm();
      ch = last = 0;
    }
    if (ch == '*' && last == '/') {
      skipBlockComm();
      ch = last = 0;
    }

    if (last == '/') {
      putchar(last);
    }//*/

    putchar(ch);
  }
  return 0;
}