Mad Libs

Write a program to read a multiline story from the input. The story will be terminated with a blank line. Then, find each replacement to be made within the story, ask the user for a word to replace it with, and make all the replacements. Stop when there are none left and print the final story.

Mad Libs is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

The input should be in the form:

<name> went for a walk in the park. <he or she>
found a <noun>. <name> decided to take it home.

It should then ask for a name, a he or she and a noun. (<name> gets replaced both times with the same value.)

C++

<lang cpp>#include <iostream>

1. include <string>

using namespace std;

int main() {

 string story, input;

 //Loop
 while(true)
 {
   //Get a line from the user
   getline(cin, input);

   //If it's blank, break this loop
   if(input == "\r")
     break;

   //Add the line to the story
   story += input;
 }

 //While there is a '<' in the story
 int begin;
 while((begin = story.find("<")) != string::npos)
 {
   //Get the category from between '<' and '>'
   int end = story.find(">");
   string cat = story.substr(begin + 1, end - begin - 1);

   //Ask the user for a replacement
   cout << "Give me a " << cat << ": ";
   cin >> input;

   //While there's a matching category 
   //in the story
   while((begin = story.find("<" + cat + ">")) != string::npos)
   {
     //Replace it with the user's replacement
     story.replace(begin, cat.length()+2, input);
   }
 }

 //Output the final story
 cout << endl << story;

 return 0;

} </lang>