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  1. #include <iostream>
  2. #include <string>
  3. #include<cstdio>
  4. using std::cin;
  5. using std::string;
  6. using std::cout;
  7. using std::endl;
  8.  
  9. int main()
  10. {
  11.     int k,n;
  12.     string text;
  13.     cin>>n;
  14.     cin>>text;
  15.     cin>>k;
  16.     k=k%26; //taking MOD 26 because it is the size of English alphabet.
  17.     char ans;
  18. 	int extra,letter;
  19.     for (int i = 0; i <n; i++)
  20.     { //cout<<text[i]<<" : ";
  21.        // if(text[i] != '\0') //check if the character is null
  22.         {
  23.             if(isalpha(text[i])) //check if the character is alphabet
  24.             {
  25.                 int d=(int)text[i] ; //obtain the ascii value
  26.  
  27.                 int t=d+k;           //obtain the encrypted value
  28.                 //if(t>122)            
  29.                 {	//cout<<t<<","<<d<<" ... ";
  30.                 	if(d>96)        //if the encrypted value of character is greater than 'a', small caps
  31.                     {	
  32.                     	if(t>122) { //if value is greater than 'z' ASCII is 122
  33.                     	 extra=t-122;
  34.                     	 letter=97 +(extra-1); //97 is ASCII of 'a'
  35.  
  36.                     }//string ans= string()+char(letter);
  37.                     else 
  38.                     	letter=char(t);
  39.                     }
  40.                     else // Upper caps
  41.                     {	if(t>90) {	//90 is ASCII of 'Z'
  42.                     	 extra=t-90;
  43.                     	 letter=65 +(extra-1); //65 is ASCII of 'A'
  44.                      }
  45.                      else
  46.                      	letter=char(t);
  47.                     }
  48.                     ans=letter;
  49.                     //cout<<char(letter);//cout<<ans;
  50.                 }
  51. 				//else
  52.                 //string ans= string()+char(t); //print the encrypted character
  53.                cout<<char(ans); //cout<<ans;
  54.              }
  55.              else              //if the character is not string, then print it just like that
  56.             {
  57.                  cout<<text[i];
  58.              } //cout<<endl;
  59.         }
  60.     }
  61. }
Success #stdin #stdout 0s 3460KB
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https://ideone.com/Jt3gUv
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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