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传入一维数组到函数 Passing 1D array to function

时间:2015-03-05 01:42:48      阅读:212      评论:0      收藏:0      [点我收藏+]

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Since arrays are always passed by reference, all changes made to the array elements inside the function will be made to the original array. 

int ProcessValues (int [], int ); // works with ANY 1-d array

Example:

#include <iostream>
using namespace std;
int SumValues (int [], int ); //function prototype

void main( )
{
  int Array[10]={0,1,2,3,4,5,6,7,8,9};
  int total_sum;
  total_sum = SumValues (Array, 10); //function call
  cout <<”Total sum is “ <<total_sum;
}

int SumValues (int values[], int num_of_values) //function header
{
  int sum = 0;
  for( int i=0; i < num_of_values; i++)
    sum+=values[i];
  return sum;
}

 

The only way to protect the elements of the array from being inadvertently changed, is to declare an array to be a const parameter.

#include <iostream>
using namespace std;
int SumValues (const int [], int); //function prototype

int main( )
{
  const int length =10;
  int Array[10]={0,1,2,3,4,5,6,7,8,9};
  int total_sum;
  total_sum = SumValues (Array, length); //function call
  cout <<”Total sum is “ <<total_sum;
  return 0;
}

int SumValues (const int values[], int num_of_values) //function header
{
  int sum = 0;
  for( int i=0; i < num_of_values; i++)
    sum+=values[i];
  return sum;
}

 

Reference:

http://stackoverflow.com/questions/23035407/passing-1d-and-2d-arrays-by-reference-in-c

http://doursat.free.fr/docs/CS135_S06/CS135_S06_8_1D_Arrays2.pdf

传入一维数组到函数 Passing 1D array to function

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原文地址:http://www.cnblogs.com/learnopencad/p/4314724.html

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