CODESYS 涓�鐨勭壒娈婃暟鎹�绫诲瀷 - 鎸囬拡

寮曡█

VAR
    pInt : POINTER TO INT;
END_VAR

VAR
    MyInt : INT := 10;
    pInt : POINTER TO INT;
END_VAR

pInt := ADR(MyInt);

VAR
    MyInt : INT := 10;
    pInt : POINTER TO INT;
END_VAR

pInt := ADR(MyInt);
pInt^ := 20; // 淇�鏀� MyInt 鐨勫�间负 20

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• 鍔ㄦ�佸唴瀛樺垎閰嶏細閫氳繃鎸囬拡鍙�浠ュ疄鐜板姩鎬佸唴瀛樺垎閰嶏紝鐏垫椿绠＄悊鍐呭瓨璧勬簮銆�
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• 鍑忓皯鏁版嵁澶嶅埗锛氶�氳繃浼犻�掓寚閽堣�屼笉鏄�鏁版嵁鏈�韬�锛屽彲浠ュ噺灏戞暟鎹�澶嶅埗锛屾彁楂樼▼搴忔�ц兘銆�
  

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• 瀹夊叏鎬ч棶棰橈細閿欒��浣跨敤鎸囬拡鍙�鑳藉�艰嚧鍐呭瓨鏁版嵁琚�绡℃敼锛屽甫鏉ュ畨鍏ㄩ殣鎮ｃ��
  

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PROGRAM SwapValues
VAR
    a : INT := 5; // 鍙橀噺 a
    b : INT := 10; // 鍙橀噺 b
    pA : POINTER TO INT; // 鎸囧悜 a 鐨勬寚閽�
    pB : POINTER TO INT; // 鎸囧悜 b 鐨勬寚閽�
    temp : INT; // 涓存椂鍙橀噺鐢ㄤ簬浜ゆ崲
END_VAR

// 鑾峰彇鍙橀噺 a 鍜� b 鐨勫湴鍧�
pA := ADR(a);
pB := ADR(b);

// 杈撳嚭浜ゆ崲鍓嶇殑鍊�
// a = 5, b = 10

// 浜ゆ崲涓や釜鍙橀噺鐨勫��
temp := pA^;
pA^ := pB^;
pB^ := temp;

// 杈撳嚭浜ゆ崲鍚庣殑鍊�
// a = 10, b = 5

• 澹版槑鍙橀噺鍜屾寚閽堬細澹版槑涓や釜鏁存暟鍙橀噺 a 鍜� b锛屼互鍙婃寚鍚戝畠浠�鐨勬寚閽� pA 鍜� pB銆�
• 鑾峰彇鍙橀噺鍦板潃锛氫娇鐢� ADR 鍑芥暟鑾峰彇鍙橀噺 a 鍜� b 鐨勫湴鍧�锛屽苟璧嬪�肩粰鎸囬拡 pA 鍜� pB銆�
• 浜ゆ崲鍙橀噺鍊硷細閫氳繃鎸囬拡 pA 鍜� pB 鐩存帴璁块棶鍜屼慨鏀瑰彉閲� a 鍜� b 鐨勫�硷紝浣跨敤涓�涓�涓存椂鍙橀噺 temp 杩涜�屼氦鎹�銆�
  

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