C语言杨氏矩阵实例教你编写

int FindNum(int arr[3][3],int k,int row,int col)
{
	int x = 0;
	int y = col-1;
	while(x<=row&&y>=0)
	{
		if(arr[x][y]<k)
		{
			x++;
		}
		else if(arr[x][y]>k)
		{
			y--;
		}
		else
		//找到了；
		return 1;
	}
	//找不到
	return 0;
}
int main()
{
	int arr[3][3]={{1,2,3},{4,5,6},{7,8,9}};
	int k = 7;
	int ret = FindNum(arr,k,3,3);
	if(ret ==1)
	{
		printf("找到了\n");
	}
	else
	printf("找不到\n");
	return 0;
}

int FindNum(int arr[3][3],int k,int* px,int* py)
{
	int x = 0;
	int y = *py-1;
	while(x<=*py&&y>=0)
	{
		if(arr[x][y]<k)
		{
			x++;
		}
		else if(arr[x][y]>k)
		{
			y--;
		}
		else
		{//找到了；
			*px = x;
			*py = y;
			return 1;
		}
	}
	//找不到
	return 0;
}
int main()
{
	int arr[3][3]={{1,2,3},{4,5,6},{7,8,9}};
	int k = 7;
	int x = 3;
	int y = 3;
	//返回型参数
	int ret = FindNum(arr,k,&x,&y);
	if(ret ==1)
	{
		printf("找到了\n");
		printf("下标是:%d,%d\n",x,y);
	}
	else
	printf("找不到\n");
	return 0;
}``