将数组传递给函数

 1 #include <iostream>

 2 #include <iomanip>

 3 using namespace std;

 4

 5 void modifyArray(int [], int);

 6 void modifyElement(int);

 7

 8 int main()

 9 {

10     const int arraySize = 5;

11     int a[arraySize] = {0, 1, 2, 3, 4};

12

13     cout << "Effects of passing entire array by reference : "

14         << "\n\nThe values of the original array are:\n";

15

16     for (int i = 0; i < arraySize; i++)

17     {

18         cout << setw(3) << a[i];

19     }

20     cout << endl;

21

22     modifyArray(a, arraySize);

23     cout << "The values of the modified array are : \n";

24

25     for (int j = 0; j < arraySize; j++)

26     {

27         cout << setw(3) << a[j];

28     }

29

30     cout << "\n\nEffects of passing array element by value : "

31         << "\n\na[3] before modifyElement: " << a[3] << endl;

32

33     modifyElement(a[3]);

34     cout << "a[3] after modifyElement : " << a[3] << endl;

35 }

36

37 void modifyArray(int b[], int sizeOfArray)

38 {

39     for (int k = 0; k < sizeOfArray; k++)

40     {

41         b[k] *= 2;

42     }

43 }

44

45 void modifyElement(int e)

46 {

47     cout << "Value of element in modifyElement: " << (e *= 2) << endl;

48 }

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