gistfile1.txt

#include <iostream>

std::string rtrim(char *from, size_t len) {
  char to[len+1];
  strncpy(to, from, len);
  while(len > 0) {
    if(to[len-1] == ' ' || to[len-1] == '\0') {
      len--;
    } else {
      break;
    }
  }
  to[len] = '\0';

  return std::string(to);

}


int main() {
  char first[] = "first";
  char second[] = "secondsecond";
  std::cout << "rtrim: " << rtrim(first, 5) << std::endl;
  std::cout << "rtrim: " << rtrim(second, 12) << std::endl;
  return 0;
}