Programa para reemplazar una palabra con asteriscos en una oración

Para la oración dada como entrada, censure una palabra específica con asteriscos ‘ * ‘. 
Ejemplo : 

Entrada: palabra = «computadora» 
texto = «GeeksforGeeks es un portal de informática para geeks. Las personas que aman la computadora y los códigos de computadora pueden contribuir con sus objetos de valor/ideas sobre códigos/estructuras de computadora aquí”. 
Salida: GeeksforGeeks es un portal de ciencia ******** para geeks. Las personas que aman los códigos ******** y ******** pueden contribuir con sus objetos de valor/ideas sobre los códigos/estructuras ******** aquí.

La idea es dividir primero la oración dada en diferentes palabras. Luego recorra la lista de palabras. Para cada palabra en la lista de palabras, verifique si coincide con la palabra dada. En caso afirmativo, reemplace la palabra con estrellas en la lista. Finalmente combine las palabras de list e print. 
 

C++

// C++ program to censor a word // with asterisks in a sentence #include<bits/stdc++.h> #include <boost/algorithm/string.hpp> using namespace std;   // Function takes two parameter string censor(string text,                     string word) {       // Break down sentence by ' ' spaces     // and store each individual word in     // a different list     vector<string> word_list;     boost::split(word_list, text, boost::is_any_of("\\ +"));       // A new string to store the result     string result = "";       // Creating the censor which is an asterisks     // "*" text of the length of censor word     string stars = "";     for (int i = 0; i < word.size(); i++)         stars += '*';       // Iterating through our list     // of extracted words     int index = 0;     for (string i : word_list)     {                   if (i.compare(word) == 0)         {               // changing the censored word to             // created asterisks censor             word_list[index] = stars;         }         index++;     }       // join the words     for (string i : word_list)     {         result += i + ' ';     }     return result; }   // Driver code int main() {     string extract = "GeeksforGeeks is a computer science "                     "portal for geeks. I am pursuing my "                     "major in computer science. ";     string cen = "computer";     cout << (censor(extract, cen)); }   // This code is contributed by Rajput-Ji

Java

// Java program to censor a word // with asterisks in a sentence class GFG {   // Function takes two parameter static String censor(String text,                      String word) {       // Break down sentence by ' ' spaces     // and store each individual word in     // a different list     String[] word_list = text.split("\\s+");       // A new string to store the result     String result = "";       // Creating the censor which is an asterisks     // "*" text of the length of censor word     String stars = "";     for (int i = 0; i < word.length(); i++)         stars += '*';       // Iterating through our list     // of extracted words     int index = 0;     for (String i : word_list)     {         if (i.compareTo(word) == 0)               // changing the censored word to             // created asterisks censor             word_list[index] = stars;         index++;     }       // join the words     for (String i : word_list)         result += i + ' ';       return result; }   // Driver code public static void main(String[] args) {     String extract = "GeeksforGeeks is a computer science "+                      "portal for geeks. I am pursuing my " +                      "major in computer science. ";     String cen = "computer";     System.out.println(censor(extract, cen)); } }   // This code is contributed by // sanjeev2552

Python3

# Python Program to censor a word # with asterisks in a sentence     # Function takes two parameter def censor(text, word):       # Break down sentence by ' ' spaces     # and store each individual word in     # a different list     word_list = text.split()       # A new string to store the result     result = ''       # Creating the censor which is an asterisks     # "*" text of the length of censor word     stars = '*' * len(word)       # count variable to     # access our word_list     count = 0       # Iterating through our list     # of extracted words     index = 0;     for i in word_list:           if i == word:                           # changing the censored word to             # created asterisks censor             word_list[index] = stars         index += 1       # join the words     result =' '.join(word_list)       return result   # Driver code if __name__== '__main__':           extract = "GeeksforGeeks is a computer science portal for geeks.\                I am pursuing my major in computer science. "                   cen = "computer"        print(censor(extract, cen))

C#

// C# program to censor a word // with asterisks in a sentence using System; using System.Collections.Generic;       class GFG {   // Function takes two parameter static String censor(String text,                      String word) {       // Break down sentence by ' ' spaces     // and store each individual word in     // a different list     String[] word_list = text.Split(' ');       // A new string to store the result     String result = "";       // Creating the censor which is an asterisks     // "*" text of the length of censor word     String stars = "";     for (int i = 0; i < word.Length; i++)         stars += '*';       // Iterating through our list     // of extracted words     int index = 0;     foreach (String i in word_list)     {         if (i.CompareTo(word) == 0)               // changing the censored word to             // created asterisks censor             word_list[index] = stars;         index++;     }       // join the words     foreach (String i in word_list)         result += i + " ";       return result; }   // Driver code public static void Main(String[] args) {     String extract = "GeeksforGeeks is a computer science "+                      "portal for geeks. I am pursuing my " +                      "major in computer science. ";     String cen = "computer";     Console.WriteLine(censor(extract, cen)); } }   // This code is contributed by PrinciRaj1992

PHP

<?php // PHP Program to censor a word // with asterisks in a sentence   // Function takes two parameter function censor($text, $word) {       // Break down sentence by ' ' spaces     // and store each individual word in     // a different list     $word_list = explode(" ", $text);       // A new string to store the result     $result = '';       // Creating the censor which is an     // asterisks "*" text of the length     // of censor word     $stars = "";     for($i = 0; $i < strlen($word); $i++)     $stars .= "*";       // count variable to access     // our word_list     $count = 0;       // Iterating through our list of     // extracted words     $index = 0;     for($i = 0; $i < sizeof($word_list); $i++)     {         if($word_list[$i] == $word)                           // changing the censored word to             // created asterisks censor             $word_list[$index] = $stars;         $index += 1;     }           // join the words     return implode(' ', $word_list); }   // Driver code $extract = "GeeksforGeeks is a computer science ".            "portal for geeks.\nI am pursuing my ".                     "major in computer science. ";         $cen = "computer"; echo censor($extract, $cen);   // This code is contributed // by Aman ojha ?>

JavaScript

<script>         // JavaScript program to censor a word       // with asterisks in a sentence               // Function takes two parameter       function censor(text, word) {         // Break down sentence by ' ' spaces         // and store each individual word in         // a different list         var word_list = text.split(" ");           // A new string to store the result         var result = "";           // Creating the censor which is an asterisks         // "*" text of the length of censor word         var stars = "";         for (var i = 0; i < word.length; i++) stars += "*";           // Iterating through our list         // of extracted words         var index = 0;         for (const i of word_list) {           if (i === word)             // changing the censored word to             // created asterisks censor             word_list[index] = stars;           index++;         }           // join the words         for (const i of word_list) {           result += i + " ";         }           return result;       }         // Driver code       var extract =         "GeeksforGeeks is a computer science " +         "portal for geeks. I am pursuing my " +         "major in computer science. ";                 var cen = "computer";       document.write(censor(extract, cen) + "<br>");         </script>

Producción

GeeksforGeeks is a ******** science portal for geeks. I am pursuing my major in ******** science.  

Complejidad de tiempo : O(longitud(palabra)+M), donde M es el número de palabras en el texto

Espacio Auxiliar : O(1)

Enfoque: Usar replace() en python3.
El método Replace() busca la string pasada como primer argumento en la string dada y luego la reemplaza con el segundo argumento.

Python3

# Python Program to censor a word # with asterisks in a sentence   extract = "GeeksforGeeks is a computer science portal for geeks.I am pursuing my major in computer science. "            cen = "computer" extract=extract.replace(cen,'*'*len(cen)) print(extract)

Producción

GeeksforGeeks is a ******** science portal for geeks.\I am pursuing my major in ******** science.