初始化列表

1 // 2 //  Box.hpp 3 //  cplus 4 // 5 //  Created by wanwan on 17/2/7. 6 //  Copyright © 2017年 yuge. All rights reserved. 7 // 8  9 #ifndef Box_hpp10 #define Box_hpp11 12 #include 
     
      13 14 class Box15 {16 public:17     double x;18     double y;19     double z;20     21     Box(double x,double y,double z);22 };23 24 #endif /* Box_hpp */
     

1 // 2 //  Box.cpp 3 //  cplus 4 // 5 //  Created by wanwan on 17/2/7. 6 //  Copyright © 2017年 yuge. All rights reserved. 7 // 8  9 #include "Box.hpp"10 #include 
     
      11 using namespace std;12 13 Box::Box(double x,double y,double z):x(x),y(y),z(z)14 {15     cout<< "x,y,z = "<
      
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1 // 2 //  main.cpp 3 //  cplus 4 // 5 //  Created by wanwan on 17/2/7. 6 //  Copyright © 2017年 yuge. All rights reserved. 7 // 8  9 #include 
     
      10 #include "Box.hpp"11 using namespace std;12 13 int main(int argc, const char * argv[]) {14     15     Box box1(10,20,30);16     return 0;17 }18 19 /*20 结果:21 x,y,z = 10,20,3022 */