怎么编这个程序..A file contains a large quantity N of numbers (say around 1000000).Design an algorithm to extract the n largest numbers from the file (say n is around 1000).There is room in memory to hold an array a[1]...a[n] of n numbers,but

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怎么编这个程序..A file contains a large quantity N of numbers (say around 1000000).Design an algorithm to extract the n largest numbers from the file (say n is around 1000).There is room in memory to hold an array a[1]...a[n] of n numbers,but

怎么编这个程序..A file contains a large quantity N of numbers (say around 1000000).Design an algorithm to extract the n largest numbers from the file (say n is around 1000).There is room in memory to hold an array a[1]...a[n] of n numbers,but
怎么编这个程序.
.A file contains a large quantity N of numbers (say around 1000000).Design an algorithm to extract the n largest numbers from the file (say n is around 1000).There is room in memory to hold an array a[1]...a[n] of n numbers,but there is not room to hold the whole file.The algorithm should scan the file sequentially just once.(You have to come and show me your program.)
我想用JAVA编.请各位提供下思路

怎么编这个程序..A file contains a large quantity N of numbers (say around 1000000).Design an algorithm to extract the n largest numbers from the file (say n is around 1000).There is room in memory to hold an array a[1]...a[n] of n numbers,but
不难编.
但是我不会用java
一个一个读进去 读第一个数的时候 就把这个数存到array的第一个位置
a[0] 然后把它设为max 然后后面的数 输进去 和已经存在array里面的数比较 如果它比max大 那它就是max 然后array里的其他数往后面移 a[n]=a[n+1] 如果它比某一个大 而那个数是a[k] 那现在它就是a[k] a[k]以后的所有数 都往后移 这样就可以了

怎么编这个程序..A file contains a large quantity N of numbers (say around 1000000).Design an algorithm to extract the n largest numbers from the file (say n is around 1000).There is room in memory to hold an array a[1]...a[n] of n numbers,but 怎么编plc程序 广数宏程序怎么编? 心形线r=a(1+cosx)(a>0) 谁能支援一下 告诉我这个用matlab怎么编程序啊 宏程序编椭圆怎么编?说说 c语言程序 s=1!+2!+3!+4!.n!这个程序怎么编 数控宏程序怎么编 cont 这个程序怎么编?速度啊输入a,b,c三个不同的数,将它们按由小到大的顺序输出 怎样用数控车床把圆柱体加工成圆椎体,有谁知道这个程序怎么编吗? 正弦曲线B类宏程序怎么编? 数控FANUC系统宏程序怎么编 加工中心圆的 程序怎么编 数控华中系统怎么编椭圆程序? plc程序表判断怎么编 可编程序控制器 怎么翻译. keil 编stm32程序,点亮几个led却总出现last line of file ends without a newline的警告编译出现一个警告 没有错误 但是仍是TARGET NOT CREATED 请问是什么原因? .输入两个正整数m和n,求其最大公约数和最小公倍数.这个程序怎么编啊?输入两个正整数m和n,求其最大公约数和最小公倍数.这个程序怎么编啊?