using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string s,s1,s2;
int count = 0;
Console.WriteLine ("請輸入你要查找的那個(gè)單詞的句子：");
string str= Console.ReadLine ();
Console.WriteLine ("請輸入你要查找的那個(gè)單詞：");
string serchword= Console.ReadLine ();
int sbcount = serchword.Count();
for (int i = 0; i < str.Count(); i++)
{
if ( i == 0)
{
s1 = " ";
s2 = str.Substring(i + sbcount ,1);
s = str.Substring(i,sbcount);
if (s1 == " " && s2 == " ")
{
if (s == serchword)
count++;
}
}
if (i + serchword.Count() < str.Count() && i != 0)
{
s1 = str.Substring(i - 1,1);
s2 = str.Substring(i + sbcount-1 ,1);
s = str.Substring(i,sbcount);
if (s1 == " " && s2 == " ")
{
if (s == serchword)
count++;
}
}
if (i + serchword.Count() == str.Count() )
{
s1 = str.Substring(i - 1,1);
s2 = " ";
s = str.Substring(i,sbcount);
if (s1 == " " && s2 == " ")
{
if (s == serchword)
count++;
}
break;
}
}
Console.WriteLine(count );
Console.ReadLine();
}
}
}你把題目說具體些，要在哪個(gè)控件上顯示數(shù)據(jù)上面是英文句子，而這里是字符串，到底是個(gè)英文句子（有空格的Look at the ball），還是隨便寫的，如 dfl j;thedfal; thesdjf 這里的the的個(gè)數(shù)哥們，不好意思，今天才看到，但是我發(fā)現(xiàn)你的還是有問題的，如果你輸入的內(nèi)容沒有the,就會不對，如ddgga,改成如下： string str = textBox1.Text.ToLower();int m = 0;for (int i = 0; i < str.Length; i++){int n = str.IndexOf("the") + 3;if (str.IndexOf("the") == -1)break;if (n > i) m++;str = str.Substring(n);}label1.Text = "the 出現(xiàn)的次數(shù)=" + m;下面是我做的，你可以參考下： int indexnumber = 0;string str = textBox1.Text.ToLower();int count= 0;for (int i = 0; i < str.Length; i++){indexnumber = str.IndexOf("the",indexnumber );if (indexnumber == -1)break;indexnumber++;count++;}label1.Text = "the 出現(xiàn)的次數(shù)=" + count;