#include <cstring>
#include <iostream>

using namespace std;


/*
 * Notice you can pass character array as type char*
 */
void change_char(char* string) {
  string[0] = 'A';
}

void initialize_strings() {
  // course_name contains 16 characters (including null terminator)
  char course_name[] = "Data structures";
  cout << "string : " << course_name << endl;
  cout << "strlen: " << strlen(course_name) << endl;
  cout << "sizeof: " << sizeof(course_name) << endl;  
  cout << endl;
  
  change_char(course_name);
  cout << "string : " << course_name << endl;
  cout << endl;

  // Insert null terminator in middle of string
  course_name[4] = '\0';
  cout << "string : " << course_name << endl;
  cout << "strlen: " << strlen(course_name) << endl;
  cout << "sizeof: " << sizeof(course_name) << endl;  
  cout << endl;
  
  // Shortcut initialization list
  char bigger_string[30] = {'\0'};

  // use strncpy not strcpy
  strncpy(bigger_string, course_name, 10);
  cout << "string: " << bigger_string << endl;
  cout << endl;

  // use strncat not strcat
  strncat(bigger_string, course_name, 10);
  cout << "string: " << bigger_string << endl;

  
}

/*
 * In this declaration of main, we have access to the
 * command line arguments
 */
int main(int argc, char *argv[]) {
 
  // initialize_strings();

  cout << "Echoing command line arguments: " << endl;
  for(int i = 0; i < argc; i++) {
    cout << "element " << i << ": " << argv[i] << endl;
  }
  cout << endl;
  return 0;
}