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  1. #include <stdlib.h>
  2. #include<iostream>
  3. #include<unordered_map>
  4. using namespace std;
  5.  
  6.  
  7. char *removeDirtyChars(char *str, char *mask_str) 
  8. { 
  9.   unordered_map<char , bool> mp;
  10.   for (int i = 0; mask_str[i];  i++){ 
  11.        mp[ mask_str[i] ] = 1; 
  12.   }
  13.  
  14.   int ip_ind = 0, res_ind = 0; 
  15.   while ( str[ip_ind] ) 
  16.   { 
  17.     char temp = str [ip_ind]; 
  18.     if (mp[temp] ==  0) 
  19.        str [res_ind++] = str [ip_ind]; 
  20.     ip_ind++; 
  21.   }     
  22.  
  23.  str[res_ind] = '\0';     
  24.  return str; 
  25. } 
  26.  
  27. int main() 
  28. { 
  29.  
  30.     char str[]         = "geeksforgeeks"; 
  31.     char mask_str[]  = "mask"; 
  32.     cout<< removeDirtyChars(str, mask_str) <<endl; 
  33.     return 0; 
  34. }
Success #stdin #stdout 0s 4388KB
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geeforgee
https://ideone.com/thulco
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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