Mad Libs
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Mad Libs is a phrasal template word game where one player prompts another for a list of words to substitute for blanks in a story, usually with funny results.
Write a program to create a Mad Libs like story. The program should 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.
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>
- 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>
Pike
this solution uses readline to make editing more convenient. <lang Pike>#!/usr/bin/pike
Stdio.Readline readln = Stdio.Readline();
void print_help() {
write(#"Write a Story.
Names or objects in the story can be made variable by referencing them as <person> <object>, etc. End the story with an empty line.
Type show to read the story. You will be asked to fill the variables, and the the story will be shown.
Type help to see this message again. Type exit to quit.
"); }
void add_line(string input) {
array variables = parse_for_variables(input); write("Found variables: %{\"%s\" %}\n", variables); story += input+"\n";
}
array parse_for_variables(string input) {
array vars = Array.flatten(array_sscanf(input, "%*[^<>]%{<%[^<>]>%*[^<>]%}%*[^<>]")); return Array.uniq(vars);
}
mapping fill_variables(string story) {
array vars = parse_for_variables(story); mapping variables = ([]); foreach(vars;; string name) { string value = readln->read(sprintf("Please name a%s %s: ", (<'a','e','i','o','u'>)[name[1]]?"":"n", name)); if (value != "") variables["<"+name+">"] = value; } return variables;
}
void show_story(string story) {
mapping variables = fill_variables(story); write("\n"+replace(story, variables));
}
void do_exit() {
exit(0);
}
mapping functions = ([ "help":print_help,
"show":show_story, "exit":do_exit, ]);
string story = "";
void main() {
Stdio.Readline.History readline_history = Stdio.Readline.History(512); readln->enable_history(readline_history); string prompt="> "; print_help(); while(1) { string input=readln->read(prompt); if(!input) exit(0); if(input == "") show_story(story); else if (functions[input]) functions[input](); else add_line(input); }
}</lang>
Sample output:
Write a Story. Names or objects in the story can be made variable by referencing them as <person> <object>, etc. End the story with an empty line. Type show to read the story. You will be asked to fill the variables, and the the story will be shown. Type help to see this message again. Type exit to quit. > <person> is a programmer. Found variables: "person" > <he or she> created <website> for all of us to enjoy. Found variables: "he or she" "website" > Please name a person: Michael Please name a he or she: he Please name a website: RosettaCode Michael is a programmer. he created RosettaCode for all of us to enjoy. > Please name a person: Guilaumme Please name a he or she: he Please name a website: PLEAC Guilaumme is a programmer. he created PLEAC for all of us to enjoy. > exit
Tcl
<lang tcl>package require Tcl 8.5 puts [string repeat "-" 70] puts "Enter the story template, ending with a blank line" while {[gets stdin line] > 0} {
append content $line "\n"
} puts [string repeat "-" 70] set mapping {} foreach piece [regexp -all -inline {<[^>]+>} $content] {
if {[dict exists $mapping $piece]} continue puts -nonewline "Give me a $piece: " flush stdout dict set mapping $piece [gets stdin]
} puts [string repeat "-" 70] puts -nonewline [string map $mapping $content] puts [string repeat "-" 70]</lang> Sample session:
---------------------------------------------------------------------- Enter the story template, ending with a blank line <name> went for a walk in the park. <he or she> found a <noun>. <name> decided to take it home. ---------------------------------------------------------------------- Give me a <name>: Wonko the Sane Give me a <he or she>: He Give me a <noun>: wild weasel ---------------------------------------------------------------------- Wonko the Sane went for a walk in the park. He found a wild weasel. Wonko the Sane decided to take it home. ----------------------------------------------------------------------