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C++ Lambda Expressions

bookChallenge: Running Total with a Lambda

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Update the addToTotal function so that the returned lambda returns the current total after adding the input value.

  • Implement the addToTotal function to return a lambda that captures total by reference.
  • The lambda should take an integer argument, add it to total, and return the updated total value.

In your main function:

  • Declare an integer variable named total and initialize it to zero.
  • Call addToTotal, passing total as an argument, and assign its return value to a variable named adder.
  • Call adder three times with the values 5, 10, and 15, each time printing the return value.
  • After the three calls, print the value of total to standard output.

Lösning

solution.cpp

solution.cpp

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Avsnitt 2. Kapitel 3
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bookChallenge: Running Total with a Lambda

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Uppgift

Swipe to start coding

Update the addToTotal function so that the returned lambda returns the current total after adding the input value.

  • Implement the addToTotal function to return a lambda that captures total by reference.
  • The lambda should take an integer argument, add it to total, and return the updated total value.

In your main function:

  • Declare an integer variable named total and initialize it to zero.
  • Call addToTotal, passing total as an argument, and assign its return value to a variable named adder.
  • Call adder three times with the values 5, 10, and 15, each time printing the return value.
  • After the three calls, print the value of total to standard output.

Lösning

solution.cpp

solution.cpp

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Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 3
single

single

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