leetcode/problems/src/array/ReadNCharacters.java at master · KindleBooks66/leetcode · GitHub

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package array;

/**

* Created by gouthamvidyapradhan on 09/12/2017. The API: int read4(char *buf) reads 4 characters at

* a time from a file.

* <p>The return value is the actual number of characters read. For example, it returns 3 if there

* is only 3 characters left in the file.

* <p>By using the read4 API, implement the function int read(char *buf, int n) that reads n

* characters from the file.

* <p>Note: The read function will only be called once for each test case.

public class ReadNCharacters {

/**

* Main method

* @param args

public static void main(String[] args) {}

/**

* @param buf

* @param n

* @return

public int read(char[] buf, int n) {

int i = 0;

int toRead = Math.min(n, buf.length);

while (i < toRead) {

char[] temp = new char[4];

int r = read4(temp);

for (int j = 0; j < r && i < toRead; j++) {

buf[i] = temp[j];

i++;

}

if (r < 4) break;

}

return Math.min(i, toRead);

}

private int read4(char[] buf) {

return 1; // return fake value just to resolve compilation error

}

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