C 语言查找数组中第二小元素程序

使用 for 循环编写一个 C 程序来查找数组中的第二小元素。在此示例中，if 语句检查项是否小于最小变量，并存储第二小的数组元素。

#include <stdio.h>
#include <limits.h>
 
int main()
{
	int i, Size;
	int smallest, secSmallest;
	
	printf("\nEnter Second Smallest Number Array Size = ");
	scanf("%d", &Size);

	int arr[Size];
	
	printf("\nEnter %d elements of an Array = ", Size);
	for (i = 0; i < Size; i++)
	{
		scanf("%d", &arr[i]);
    }
	 
	smallest = secSmallest = INT_MAX;  
	   
	for (i = 0; i < Size; i++)
	{
		if(arr[i] < smallest)
		{
			secSmallest = smallest;
			smallest = arr[i];
		}
		else if(arr[i] < secSmallest && arr[i] != smallest)
		{
			secSmallest = arr[i];
		}	
	}
	printf("\nThe Smallest Number in this Array =  %d\n", smallest);
	printf("The second Small Number in this Array =  %d\n", secSmallest);
	
}

在此程序中，我们将数组按降序排序，因此倒数第二个元素是第二小的元素。

#include <stdio.h>
#include <limits.h>
 
int main()
{
	int Size, i;
	
	printf("\nEnter Size = ");
	scanf("%d", &Size);
	
	int arr[Size];

	printf("\nEnter %d elements = ", Size);
	for (i = 0; i < Size; i++)
	{
		scanf("%d", &arr[i]);
    }
	   
	for (i = 0; i < Size; i++)
	{
		int temp;
		for(int j = i + 1; j < Size; j++)
		{
			if(arr[i] < arr[j])
			{
				temp = arr[i];
				arr[i] = arr[j];
				arr[j] = temp;
			}
		}
	}
	printf("\nThe Smallest Number =  %d\n", arr[Size - 1]);
	printf("The second Small Number =  %d\n", arr[Size - 2]);
	
}

Enter Size = 8

Enter 8 elements = 11 99 14 22 7 90 3 20

The Smallest Number =  3
The second Small Number =  7