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 -
while ((a = str1.IndexOf(pattern, a)) != -1) { a += pattern.Length; count++; }
您可以尝试运行以下代码来计算字符串中单词的出现次数。
实时演示
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; } }
Occurrence:2
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