cppScope errorMedium

Unexpected behavior when returning string from function

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BugFind the bug and fix the code

What it should do

Create a greeting string based on the input name. Example: createGreetingMessage("Alice") -> "Hello, Alice!"

What happens instead

The program runs without errors but produces unexpected or garbled output.

#include <iostream> 
#include <string> 
using namespace std; 

string createGreetingMessage(const string& name) { 
  string greeting = "Hello, " + name + "!"; 
  return greeting; 
} 

int main() { 
  cout << createGreetingMessage("Alice") << endl; 
  return 0; 
}

Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).

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This bug belongs to the scope and closure bugs pattern

Every callback reports the last value, a counter never increments, UnboundLocalError on a variable you can see.

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#include <iostream> #include <string> using namespace std; string createGreetingMessage(const string& name) { string greeting = "Hello, " + name + "!"; return greeting; } int main() { cout << createGreetingMessage("Alice") << endl; return 0; }

Unexpected behavior when returning string from function

What it should do

What happens instead

More scope and closure bugs to practise

Unexpected behavior when returning string from function

What it should do

What happens instead

More scope and closure bugs to practise