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  1. //ask for a person's name, and greet the person
  2. #include<iostream>
  3. #include<string>
  4.  
  5. using std::cin;
  6. using std::cout;
  7.  
  8. int main(){
  9.     /*std::cout << "Please enter your name: ";
  10.     std::string name;
  11.     std::cin >> name;
  12.  
  13.     //build the message that we intend to write
  14.     const std::string greeting = "Hello, " + name + "!";
  15.     
  16.     //build the second and fourth lines of the output
  17.     const std::string spaces(greeting.size(), ' ');
  18.     const std::string second = "* " + spaces + " *";
  19.  
  20.     //build the first and fifth lines of the output
  21.     const std::string first(second.size(), '%');
  22.  
  23.     //write it all
  24.     std::cout << std::endl;
  25.     std::cout << first << std::endl;
  26.     std::cout << second << std::endl;
  27.     std::cout << "* "<< greeting<< " *"<< std::endl;
  28.     std::cout << second << std::endl;
  29.     std::cout << first << std::endl;
  30. {{
  31.     const std::string hello = "Hello";
  32.     const std::string message = hello + ",World" + "!"
  33. };} //why this compiles i have no idea
  34.     return 0; */
  35.  
  36.     //ask for the person's name
  37.     std::cout<< "please enter your first name: ";
  38.  
  39.     //read the name
  40.     std::string name;
  41.     std::cin >> name;
  42.  
  43.     //build the message that we intend to write
  44.     const std::string greeting = "Hello. " + name + "!";
  45.  
  46.     //the number of blanks surrounding the greeting
  47.     const int pad = 1;
  48.  
  49.     //the number of rows and columns to write
  50.     const int rows = pad * 2 + 3;
  51.     const std::string::size_type cols = greeting.size() + pad *2 + 2;
  52.  
  53.     //write a blank line to separate the output from the input
  54.     cout << std::endl;
  55.  
  56.     //write rows rows of output 
  57.     //invariant: we have written r rows so far
  58.     for (int r=0; r != rows ; ++r){
  59.         std::string::size_type c = 0;
  60.  
  61.         //invariant: we have written c characters so far in the current row
  62.         while(c != cols){
  63.  
  64.             //is it time to write the greeting?
  65.             if(r == pad + 1 && c==pad +1){
  66.                 cout << greeting;
  67.                 c += greeting.size();
  68.             }else {
  69.  
  70.                 //are we on the border?
  71.                 if (r == 0 || c ==0 || r == rows-1 || c == cols-1)
  72.                     cout << "*";
  73.                 else
  74.                     cout << " ";
  75.                 ++c;
  76.             }
  77.         }
  78.  
  79.  
  80.  
  81.     return 0;
  82. }
  83. }
Success #stdin #stdout 0.01s 5312KB
comments (?)
stdin 
karthy
stdout 
please enter your first name: 
******************
https://ideone.com/cUtNDi
language:
C++ (gcc 8.3)
created:
187 days ago
visibility:
secret

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