Leetcode 157:read N characters Given Read4

Read N characters Given Read4Total Accepted: 960 Total Submissions: 3775

The API: int read4(char *buf) reads 4 characters at a time from a file.

The return value is the actual number of characters read. For example, it returns 3 if there are only 3 characters left in the file.

read4by using the API, implement the function that int read(char *buf, int n) readsn characters from the file.

Note:
The function is only being read called once for each test case.

Analysis

None

Note

None

[CODE]

/* The READ4 API is defined in the parent class Reader4.      int Read4 (char[] buf);  */public class Solution extends Reader4 {    /**     * @param buf Destination Buffer     * @param n   Maximum number of Characters to read     * @return    The number of characters read     *    /public int read (char[] buf, int n) {        if (Buf==null | | n<=0) return 0;        int i=0;        char[] temp = new Char[4];        while (n>0) {            int x = READ4 (temp);            int j = 0;            int k = x;            while (n>0 && x>0) {                buf[i++] = temp[j++];                --x;                --n;            }            if (k<4) break;        }        return i;    } }

Leetcode 157:read N characters Given Read4