Replace E-mail with Stars, Asterisk (*). A C++ program to replace Email with special character and print it.

 In this program we will replace the Email id provided by user with Asterisk (Star "*"). Only the First letter, the letter after "@" and ".com" will be visible. This is one of the most commonly asked interview program. 

Program to replace Email with Asterisk "*"

Logic :

• Store special Characters "@" and "." 
• Input String (Email)
• Calculate and store length of string 
• Set a variable to store index of special character
• Replace characters with star till "@"
• Print next character and replace rest characters with star till "."
• Print ".com" 

Code :

#include <iostream>

using namespace std;

int main() {

    

 char a = '@';

 char b = '.';

 

 string s;

 cin>>s;

 

 int l = s.length();

 int k = 0;

 

 for(int i=1;i<l;i++){

     if(s[i]== a) {

         k = i;

         break;

     }

     else{

         s[i] = '*';

     } 

 }

 

 for(int i = k+2; i<l;i++){

     if(s[i]== b){ 

         break;

     }

     else {

         s[i]='*';

     }

 }

 

 cout<<s<<endl;

 

}

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