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法律研究C# 程式來查詢字串中某個字元出現的次數
假設我們的字串為 −
String s = "mynameistomhanks";
現在建立一個新陣列，把一個新方法連同上面宣告的字串一起傳進去。這將計算字串中字元出現的次數。
static void calculate(String s, int[] cal) {
for (int i = 0; i < s.Length; i++)
cal[s[i]]++;
}我們來看看完整的程式碼。
示例
using System;
class Demo {
static int maxCHARS = 256;
static void calculate(String s, int[] cal) {
for (int i = 0; i < s.Length; i++)
cal[s[i]]++;
}
public static void Main() {
String s = "mynameistomhanks";
int[] cal = new int[maxCHARS];
calculate(s, cal);
for (int i = 0; i < maxCHARS; i++) {
if (cal[i] > 1) {
Console.WriteLine("Character " + (char) i);
Console.WriteLine("Occurrence = " + cal[i] + " times");
}
if (cal[i] == 1) {
Console.WriteLine("Character " + (char) i);
Console.WriteLine("Occurrence = " + cal[i] + " time");
}
}
}
}輸出
Character a Occurrence = 2 times Character e Occurrence = 1 time Character h Occurrence = 1 time Character i Occurrence = 1 time Character k Occurrence = 1 time Character m Occurrence = 3 times Character n Occurrence = 2 times Character o Occurrence = 1 time Character s Occurrence = 2 times Character t Occurrence = 1 time Character y Occurrence = 1 time
更新於: 2020-06-22
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