asp.net c#数组用法

type[]   typename=new type[size]; 

如int[] a=new int[2];string[] str=new string[5];

实事上我们平常是用int[],string[]...的,此时我们已经创建一个Array数组,只不过我们平常没有这种意识而已.

(1):type数据类型不能缺;且要统一,而不能是如 int[] a=new Array[];

(2):数组的大小size不能缺,否则c#认为是出错的,因为数组是一段固定长度的内存;

(3):右边是一个中括号[],而不是()

看一个简单实例

#include
using namespace std;
 
int main()
{
  int sample[10]; // this reserves 10 integer elements
  int t;
 
  // load the array
  for(t=0; t<10; ++t) sample[t] = t;
 
  // display the array
  for(t=0; t<10; ++t)
    cout << "This is sample[" << t << "]: " << sample[t] << "n";
 
  return 0;
}

输出

This is sample[0]: 0
This is sample[1]: 1
This is sample[2]: 2
This is sample[3]: 3
This is sample[4]: 4
This is sample[5]: 5
This is sample[6]: 6
This is sample[7]: 7
This is sample[8]: 8
This is sample[9]: 9

求数组平均值

#include   
using namespace std;  
  
int main()  
{  
  int i, avg, min_val, max_val;
  int nums[10];  
  
  nums[0] = 13;  
  nums[1] = 18;  
  nums[2] = 75;  
  nums[3] = 120;  
  nums[4] = 1321;  
  nums[5] = 56;  
  nums[6] = 13124;  
  nums[7] = 12123;  
  nums[8] = -19312;  
  nums[9] = 88123;  
  
  // compute the average
  avg = 0;
  for(i=0; i<10; i++)
    avg += nums[i];
 
  avg /= 10;
 
  cout << "Average is " << avg << 'n';  
 
  return 0;  
}
 
Average is 9566

查找数据中最大值与最小值

#include   
using namespace std;  
  
int main()  
{  
  int i, avg, min_val, max_val;
  int nums[10];  
  
  nums[0] = 13;  
  nums[1] = 18;  
  nums[2] = 75;  
  nums[3] = 120;  
  nums[4] = 1321;  
  nums[5] = 56;  
  nums[6] = 13124;  
  nums[7] = 12123;  
  nums[8] = -19312;  
  nums[9] = 88123;  
  
 
  // find minimum and maximum values     
  min_val = max_val = nums[0];  
  for(i=1; i<10; i++) {  
    if(nums[i] < min_val) min_val = nums[i]; 
    if(nums[i] > max_val) max_val = nums[i]; 
  } 
 
  cout << "Minimum value: " << min_val << 'n';  
  cout << "Maximum value: " <<  max_val << 'n';  
  
  return 0;  
}
 
Minimum value: -19312
Maximum value: 88123