Compter les occurrences d'un mot dans une chaîne : Guide Complet et Exemples

// Fonction C++ pour compter les occurrences
int countOccurrences(char *str, string word) {
    char *p;
    vector<string> a;
    p = strtok(str, " ");
    while (p != NULL) {
        a.push_back(p);
        p = strtok(NULL, " ");
    }
    int c = 0;
    for (int i = 0; i < a.size(); i++)
        if (word == a[i])
            c++;
    return c;
}

// Fonction C pour compter les occurrences
int countOccurrences(char *str, char *word) {
    char *p;
    char *a[300];
    int index=0;
    p = strtok(str, " ");
    while (p != NULL) {
        a[index++]=(p);
        p = strtok(NULL, " ");
    }
    int c = 0;
    for (int i = 0; i < index; i++)
        if (strcmp(word , a[i])==0){
            c++;
        }
    return c;
}

// Fonction Java pour compter les occurrences
static int countOccurrences(String str, String word) {
    String a[] = str.split(" ");
    int count = 0;
    for (int i = 0; i < a.length; i++) {
        if (word.equals(a[i]))
            count++;
    }
    return count;
}

# Fonction Python pour compter les occurrences
def countOccurrences(str, word):
    a = str.split(" ")
    count = 0
    for i in range(0, len(a)):
        if (word == a[i]):
            count = count + 1
    return count

// Fonction C# pour compter les occurrences
static int countOccurrences(string str, string word) {
    string[] a = str.Split(' ');
    int count = 0;
    for (int i = 0; i < a.Length; i++) {
        if (word.Equals(a[i]))
            count++;
    }
    return count;
}

// Fonction Javascript pour compter les occurrences
function countOccurrences(str,word) {
  let a = str.split(" ");
  let count = 0;
  for (let i = 0; i < a.length; i++) {
    if (word==(a[i]))
      count++;
  }
  return count;
}

<?php
// Fonction PHP pour compter les occurrences
function countOccurrences( $str , $word ) {
  $a = explode( " ", $str );
  $count = 0;
  for( $i = 0; $i < sizeof( $a ); $i++ ){
    if( $word == $a[$i])
      $count ++;
  }
  return $count ;
}
?>

def countOccurrences(str, word):
    wordslist = list(str.split())
    return wordslist.count(word)

import re
def count_word_occurrences2(string, word):
    return len(re.findall(word, string))

import java.util.regex.*;
public class WordOccurrences {
    public static int countWordOccurrences(String str, String word) {
        Pattern pattern = Pattern.compile("\\b" + Pattern.quote(word) + "\\b");
        Matcher matcher = pattern.matcher(str);
        int count = 0;
        while (matcher.find()) {
            count++;
        }
        return count;
    }
}

#include <iostream>
#include <string>
#include <regex>

using namespace std;

int count_word_occurrences2(const string& str, const string& word) {
    regex regex_word(word);
    sregex_iterator it(str.begin(), str.end(), regex_word);
    sregex_iterator end;
    int count = 0;
    while (it != end) {
        count++;
        ++it;
    }
    return count;
}