[問題] C++ constructor (建構子) 一問

看板C_and_CPP作者Rukawa31 (楓)時間13年前 (2011/05/28 23:30)推噓4(4推 0噓 7→)

留言11則, 7人參與討論串1/1

#include <iostream> using namespace std; class TestClass { public: TestClass() { this->a = 1; this->b = 1; this->c = 1; cout << "Call constructor TestClass()" << endl; } TestClass( int aa ) { TestClass(); this->a = aa; } ~TestClass() {} int getA() { return this->a; } int getB() { return this->b; } int getC() { return this->c; } private: int a; int b; int c; }; int main( int argc, char* argv[] ) { TestClass testClass( 2 ); cout << "a = " << testClass.getA() << endl; cout << "b = " << testClass.getB() << endl; cout << "c = " << testClass.getC() << endl; return 0; } ----- 以上是個簡單的例子來說明我的問題上面程式我預期的結果是 Call constructor TestClass() a = 2 b = 1 c = 1 但在windows和linux跑出來的結果分別是 codeblocks on windows: Call constructor TestClass() a = 2 b = 2293544 c = 4273318 和 gcc 4.1.2 on linux Call constructor TestClass() a = 2 b = 0 c = 0 很顯然b,c沒被賦予值但覺得奇怪的地方是明明有呼叫到TestClass()... 請問我的觀念錯在哪呢? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.123.105.140

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sudada

05/28 23:52, , 1^F

05/28 23:52, 1^F

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hilorrk

05/28 23:52, , 2^F

05/28 23:52, 2^F

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sudada

05/28 23:52, , 3^F

05/28 23:52, 3^F