The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)
P A H N A P L S I I G Y I RAnd then read line by line:
"PAHNAPLSIIGYIR"
Write the code that will take a string and make this conversion given a number of rows:
string convert(string text, int nRows);
convert("PAYPALISHIRING", 3) should return "PAHNAPLSIIGYIR".
public class Solution {
public String convert(String s, int numRows) {
if(numRows==1) return s; //行数为1,则字符串不变
int x = 2 * (numRows-1); // 对数据进行分组 |/|/|...(|/)
int len = s.length();
char[] c = new char[len]; //两个字符串的长度是一样的
int k =0;
for(int i=0; i < numRows; i++)
{
for(int j=i;j<len;j=j+x)
{
c[k++] = s.charAt(j); //根据规则一行一行输入数据(|)
if(i>0 && i<numRows-1 && j+x-2*i < len) //判断是否符合(/)则按另一种规则放置字符
{
c[k++] = s.charAt(j+x-2*i);
}
}
}
return new String(c);
}
}
本文介绍了一种将字符串转换为指定行数的zigzag模式的方法,并提供了相应的代码实现。
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