Read N Characters Given Read4
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 is only 3 characters left in the file.
By using theread4
API, implement the functionint read(char *buf, int n)
that readsncharacters from the file.
Example 1:
Input: buf = "abc", n = 4
Output: "abc"
Explanation: The actual number of characters read is 3, which is "abc".
Example 2:
Input: buf = "abcde", n = 5
Output: "abcde"
Note:
Theread
function will only be called once for each test case.
Solution
/* 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) {
}
}
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