<pre name="code" class="plain">#include <stdio.h>
#define N 10
void swap (int *a, int i, int j);
int main(void)
{
	int a[N] = {1, -1, -2, 0, -4, -4, -5, 7, 8, -10};
	int i = 0;
	int j = 0;
	int isswap = 0;
	for(i = 0, j = N - 1; i != j;)
	{
		if(isswap == 0)
		{
			if(a[j] < 0)
			{
				isswap = 1;
				continue;  //不需要移動,就替換當前的值
			}
			j--; //如果當前值大於0，則移動下標
		}
		if(isswap == 1)
		{
			if(a[i] >= 0) 
			{
				swap(a, i, j);
				isswap = 0;
			}
			i++;
		}
	}

	for(i = 0; i < N; i++) 
	{
		printf("%4d", a[i]);
	}
	puts("\n");
	return 0;
}

void swap (int *a, int i, int j) 
{
	int temp;
	temp = a[i];
	a[i] = a[j];
	a[j] = temp;
}