如何使用C#获取字符串中出现最高的字符？
字符串中出现次数最多的字符是出现次数最多的字符。可以使用以下示例演示这一点。
String: apples are red The highest occurring character in the above string is e as it occurs 3 times, which is more than the occurrence of any other character.
给出使用C#获取字符串中出现频率最高的字符的程序，如下所示。
示例
using System;
namespace charCountDemo {
public class Example {
public static void Main() {
String str = "abracadabra";
int []charCount = new int[256];
int length = str.Length;
for (int i = 0; i < length; i++) {
charCount[str[i]]++;
}
int maxCount = -1;
char character = ' ';
for (int i = 0; i < length; i++) {
if (maxCount < charCount[str[i]]) {
maxCount = charCount[str[i]];
character = str[i];
}
}
Console.WriteLine("The string is: " + str);
Console.WriteLine("The highest occurring character in the above string is: " + character);
Console.WriteLine("Number of times this character occurs: " + maxCount);
}
}
}输出结果
上面程序的输出如下。
The string is: abracadabra The highest occurring character in the above string is: a Number of times this character occurs: 5
现在，让我们了解以上程序。
字符串str是abracadabra。将创建一个新的数组charCount，其大小为256，并显示ASCII表中的所有字符。然后，使用for循环遍历字符串str，并且charCount中的值对应于字符串中的字符而递增。在下面的代码片段中可以看到。
String str = "abracadabra";
int []charCount = new int[256];
int length = str.Length;
for (int i = 0; i < length; i++) {
charCount[str[i]]++;
}整数maxCount存储最大计数，字符是出现最大次数的char值。可以使用for循环确定maxCount和character的值。在下面的代码片段中可以看到。
int maxCount = -1;
char character = ' ';
for (int i = 0; i < length; i++) {
if (maxCount < charCount[str[i]]) {
maxCount = charCount[str[i]];
character = str[i];
}
}最后，显示str，maxCount和character的值。在下面的代码片段中可以看到。
Console.WriteLine("The string is: " + str);
Console.WriteLine("The highest occurring character in the above string is: " + character);
Console.WriteLine("Number of times this character occurs: " + maxCount);