C++
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#include
"stdio.h"
class
Demo{
public
:
聽聽聽
int i;
聽聽聽
char* objName;
聽聽聽 Demo(){
聽聽聽聽聽聽聽 objName = "Default object.";
聽聽聽聽聽聽聽 printf("%s, objName = %s\r\n", "Enter Demo default ctor. method.", objName);
聽聽聽聽聽聽聽
聽聽聽聽聽聽聽 i = 1000;
聽聽聽 }
聽聽聽 Demo(int ival, char* name){
聽聽聽聽聽聽聽 printf("%s,i = %d, objName = %s\r\n", "Enter Demo(int ival) ctor method", ival, name);
聽聽聽聽聽聽聽 i = ival;
聽聽聽聽聽聽聽 objName = name;
聽聽聽 }
聽聽聽 Demo(const Demo& d){
聽聽聽聽聽聽聽 printf("%s\r\n", "Enter Demo copy ctor method.");
聽聽聽聽聽聽聽 i = d.i;
聽聽聽聽聽聽聽 objName = "copied d";
聽聽聽 }
聽聽聽 ~Demo(){
聽聽聽聽聽聽聽 printf("%s, i = %d, objName = %s\r\n", "Enter Demo dector. method" , i, objName);
聽聽聽 }
};
Demo& testMethod0(){
聽聽聽 printf("%s\r\n", "Enter testMethod0.");
聽聽聽 Demo d(0, "d in testMethod0");
聽聽聽 printf("%s\r\n", "Exit testMethod0.");
聽聽聽
return d;
}
Demo testMethod1(){
聽聽聽 printf("%s\r\n", "Enter testMethod1.");
聽聽聽 Demo d(1, "d in testMethod1");
聽聽聽 printf("%s\r\n", "Exit testMethod1.");
聽聽聽
return d;
}
Demo* testMethod2(){
聽聽聽 printf("%s\r\n", "Enter testMethod2.");
聽聽聽 Demo *d = new Demo(2, "d in testMethod2");
聽聽聽 printf("%s\r\n", "Exit testMethod2.");
聽聽聽
return d;
}
int
main(int argc, _TCHAR* argv[])
{
聽聽聽 Demo d;
聽聽聽 d = testMethod1();
聽聽聽 Demo& d1 = testMethod0();
聽聽聽 Demo d2(999, "d1");
聽聽聽 Demo* d3 = testMethod2();
聽聽聽 printf("d.i = %d\r\n", d.i);
聽聽聽 printf("d1.i = %d\r\n", d1.i);
聽聽聽 printf("d2.i = %d\r\n", d2.i);
聽聽聽 printf("d3.i = %d\r\n", d3->i);
聽聽聽
delete d3;
聽聽聽
return 0;
}
Output
錛?/span>
Enter Demo default ctor. method., objName = Default object.
Enter testMethod1.
Enter Demo(int ival) ctor method,i = 1, objName = d in testMethod1
Exit testMethod1.
Enter Demo copy ctor method.
Enter Demo dector. method, i = 1, objName = d in testMethod1
Enter Demo dector. method, i = 1, objName = copied d
Enter testMethod0.
Enter Demo(int ival) ctor method,i = 0, objName = d in testMethod0
Exit testMethod0.
Enter Demo dector. method, i = 0, objName = d in testMethod0
Enter Demo(int ival) ctor method,i = 999, objName = d1
Enter testMethod2
Enter Demo(int ival) ctor method,i = 2, objName = d in testMethod2
Exit testMethod2.
d.i = 1
d1.i = -2
d2.i = 999
d3.i = 2
Enter Demo dector. method, i = 2, objName = d in testMethod2
Enter Demo dector. method, i = 999, objName = d1
Enter Demo dector. method, i = 1, objName = copied d
涓?/span>
C#
涓嶅悓錛屽湪
C++
涓紝瀵硅薄澹版槑鐨勬椂鍊欏氨宸茬粡鎵ц浜嗘瀯閫犲嚱鏁幫紝姣斿涓婇潰渚嬪瓙鐨?/span>
main
鍑芥暟涓殑絎竴琛岋紝
Demo d
錛屼粠灞忓箷涓婄殑杈撳嚭鏉ョ湅錛岃繖涓椂鍊?/span>
Demo class
鐨勯粯璁ゆ瀯閫犲嚱鏁頒細琚皟鐢ㄣ?/span>
鎺ヤ笅鏉ョ殑涓琛屼唬鐮佽皟鐢紝寮曞嚭浜嗗緢鏈夎叮鐨勬儏鍐碉紝褰撶劧涔熼殣钘忕潃涓嶅皬鐨勯棶棰樸傝繖琛屼唬鐮侀犳垚浜嗕竴嬈℃瀯閫犲嚱鏁拌皟鐢紝涓嬈℃嫹璐濇瀯閫犲嚱鏁拌皟鐢ㄥ拰涓ゆ鏋愭瀯鍑芥暟璋冪敤銆傝鎴戜滑鏉ュ叿浣撳垎鏋愪竴涓嬶細絎竴嬈¤皟鐢ㄦ瀯閫犲嚱鏁板緢瀹規槗鐞嗚В錛屽洜涓哄湪
testMethod1
涓垜浠０鏄庝簡
Demo d(0)
錛岄鍑?/span>
testMethod1
錛屽嚱鏁扮殑榪斿洖鍊艱璧嬪肩粰鍙橀噺
d2
錛岃繖涓椂鍊欙紝
d2
琚嫹璐濇瀯閫犲嚱鏁伴噸鏂版瀯閫犱簡涓嬈°傛帴鐫
testMethod1
涓瀯閫犵殑灞閮ㄥ彉閲忚鏋愭瀯錛岀劧鍚庯紝灞呯劧鎷瘋礉鏋勯犲嚱鏁版瀯閫犵殑瀵硅薄涔熻鏋愭瀯錛熺瓑絳夛紝鐪嬪畬鎵鏈夎緭鍑猴紝鎴戜滑鍙戠幇錛?/span>
objName = copied d
鐨勫璞¤鏋愭瀯涓ゆ錛岃?/span>
objName = Default obj
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copy
榪欎釜瀵硅薄浼氭庝箞鏍鳳紵
鎺ヤ笅鏉ョ殑涓琛屼唬鐮侊紝
testMethod0
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testMethod0
閫鍑轟互鍚庯紝浠栧唴閮ㄧ殑
Demo
瀵硅薄灝變細鑷姩鏋愭瀯錛屽闈㈠瀹冪殑寮曠敤褰撶劧涔熸棤娉曟寚鍚戞紜殑瀵硅薄浜嗭紝鎵浠ュ悗闈㈢▼搴忔墦鍗?/span>
d.i
鐨勬椂鍊欙紝杈撳嚭浜嗕竴涓帿鍚嶅叾濡欑殑
-2
銆?/span>
鏁堢巼鏈濂界殑鏂規硶褰撴暟榪斿洖鎸囬拡浜嗭紝瀹冧笉浼氬鑷村璞″鍒訛紝濡傛灉浣跨敤寰楀綋錛屼篃涓嶄細瀵艱嚧鍐呭瓨娉勬紡鎴栬呭彞鏌勬硠婕忋?/span>
testMethod2
婕旂ず浜嗚繖縐嶆儏鍐碉紝褰撶劧錛屼綘闇瑕佹墜宸ュ垹闄ゅ湪
testMethod2
涓垱寤虹殑瀵硅薄銆?/span>