Add currency code as suffix to prices in WooCommerce

add_currency_code_suffix.php

//* http://www.codemyownroad.com/add-currency-code-suffix-prices-woocommerce/
//  Location: add to functions.php
//  Output: displays $0.00 AUD on all pages

function addPriceSuffix($format, $currency_pos) {
	switch ( $currency_pos ) {
		case 'left' :
			$currency = get_woocommerce_currency();
			$format = '%1$s%2$s ' . $currency;
		break;
	}
 
	return $format;
}
 
add_action('woocommerce_price_format', 'addPriceSuffix', 1, 2);

add_currency_code_suffix2.php

//* http://www.codemyownroad.com/add-currency-code-suffix-prices-woocommerce/
//  Location: add to functions.php
//  Output: displays $0.00 AUD on cart and checkout pages ONLY

function addPriceSuffix($format, $currency_pos) {
	switch ( $currency_pos ) {
		case 'left' :
			$currency = get_woocommerce_currency();
			$format = '%1$s%2$s ' . $currency;
		break;
	}
 
	return $format;
}
 
function addPriceSuffixAction() {
	add_action('woocommerce_price_format', 'addPriceSuffix', 1, 2);
}
 
add_action('woocommerce_before_cart', 'addPriceSuffixAction');
add_action('woocommerce_review_order_before_order_total', 'addPriceSuffixAction');

change_currency_symbol.php

//* http://docs.woothemes.com/document/change-a-currency-symbol/
//  Location: add to functions.php
//  Output: adds AUD in front of $

add_filter('woocommerce_currency_symbol', 'change_existing_currency_symbol', 10, 2);

function change_existing_currency_symbol( $currency_symbol, $currency ) {
     switch( $currency ) {
          case 'AUD': $currency_symbol = 'AUD$'; break;
     }
     return $currency_symbol;
}

@kittenlane: Works great for one currency, thank you! However, when using multiple currencies, WooCommerce shows always the same currency code on the orders tab.

Could you please advise on how to adjust the code from [add_currency_code_suffix.php] to set a specific currency code for every currency? (e.g. when you have USD, AUD and CAD as currencies, it should display USD for USD, AUD for AUD and CAD for CAD).

I appreciate your feedback!