C#程序计算字符串中单词的出现次数
首先设置字符串-
string str = "Hello World! Hello!";
现在检查字符串中是否出现单词“Hello”，并循环遍历-
while ((a = str1.IndexOf(pattern, a)) != -1) {
a += pattern.Length;
count++;
}示例
您可以尝试运行以下代码来计算字符串中某个单词的出现次数。
using System;
class Program {
static void Main() {
string str = "Hello World! Hello!";
Console.WriteLine("Occurrence:"+Check.CheckOccurrences(str, "Hello"));
}
}
public static class Check {
public static int CheckOccurrences(string str1, string pattern) {
int count = 0;
int a = 0;
while ((a = str1.IndexOf(pattern, a)) != -1) {
a += pattern.Length;
count++;
}
return count;
}
}输出结果
Occurrence:2