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  1. Prepare
  2. Algorithms
  3. Strings
  4. Caesar Cipher
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Caesar Cipher

  • mohammadhammads1
     + 0 comments

    cpp solution 

    string caesarCipher(string s, int k) {
int len = s.size() ;
k = k % 26 ;
for(int i = 0 ; i < len ; i++ ){

    if(s[i] <= 'z' && s[i] >= 'a'){
        if(s[i] + k > 'z'){
            s[i] = 'a' + (k - (int('z') - int(s[i]))-1) ;
        }else{
            s[i] = s[i] + k ;
        }
    }else if(s[i] <= 'Z' && s[i] >= 'A'){
        if(s[i] + k > 'Z'){
            s[i] = 'A' + (k-(int('Z') - int(s[i]))-1) ;
        }else{
            s[i] = s[i] + k ;
        }
    }

}


return s ;

    }