/C++程序员面试秘籍

1、函数返回的参数引用

[cpp] view
plaincopy

  1. #include "stdafx.h"
  2. #include <iostream>
  3. #include <set>
  4. using namespace std;
  5. float f;
  6. const float pi=3.14f;
  7. float f1(float r)
  8. {
  9. f=r*r*pi;
  10. return f;
  11. }
  12. float& f2(float r)
  13. {
  14. f=r*r*pi;
  15. return f;
  16. }
  17. int main()
  18. {
  19. float f1(float=5);//相当于是函数执行了一遍，没有返回值，但是为什么形参可以这样写呢，还要加上float
  20. float& f2(float=5);
  21. float a=f1();//为什么不用参数也可以匹配到
  22. //float& b=f1();
  23. float c=f2();
  24. float& d=f2();
  25. d+=1.0f;
  26. cout<<a<<" "<<" "<<c<<" "<<d<<endl;
  27. return 0;
  28. }

这里不明白其用法，需要好好看下书。

2、指针与数组

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plaincopy

  1. int *a=new int[5]();//数组指针
  2. int *c[5];//指针数组，一般作为函数指针
  3. int (*b)[10]
  4. 以及二维动态数组的创建又忘了

3、华为题1

计算最大数字连串的问题

http://www.meilijia.com/collection/862163

http://www.meilijia.com/collection/862164

http://www.meilijia.com/collection/862165

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http://www.meilijia.com/collection/862179

http://www.meilijia.com/collection/862180

http://www.meilijia.com/collection/862181

http://www.meilijia.com/collection/862182

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时间： 2024-08-13 20:43:22

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