Implementing Loops to Modify Code - Loop Modification

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In summary, the conversation discusses the implementation of different types of loops in C++ and the necessary code to add for each one. The code also mentions the scope of the variable "i" inside and outside the body of each loop and the minimum number of iterations for each type of loop. The minimum number of iterations for a for loop is 0, for a do while loop is 1, and for a while loop is 0.
  • #1
carl123
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a) The following code implements a for loop, a do while loop, and a while loop. There are stubs for four additional loops. You are to add the code necessary to implement the missing loops as indicated by the comments. When adding code for a for loop, you must fill in all three parts in the for statement, i.e. the parts inside the parenthesis. Outputs for the three versions of Loop A should be identical. The three versions of Loop B should behave in the same way. Outputs for the three versions of Loop C should be identical.

Code:
#include "std_lib_facilities_4.h" 
int main(int argc, char* argv[]) {
  cout << "Loop A (for version)" << endl;
  for (int i=0;i<5;i++) {
    cout << i << endl;
  }

  cout << "Loop A (while version)" << endl;
  // Add while loop code
    
  cout << "Loop A (do while version)" << endl;
  // Add do while loop code

  cout << "Loop B (do while version)" << endl;
  int i;
  do {
    cout << "Enter a number less than 100 (Greater than 100 to exit):" << endl;
    cin >> i;
    cout << i << endl;
  } while (i<100);

  cout << "Loop B (for version)" << endl;
  // Add for loop code
  
  cout << "Loop B (while version)" << endl;
  // Add while loop code

  cout << "Loop C (while version)" << endl;
    int i = 20;
    while (i>10) {
      cout << i*2 << " ";
      i-=2;
    }
    cout << endl << endl;

  cout << "Loop C (do while version)" << endl;
  // Add do while loop code

  cout << "Loop C (for version)" << endl;
  // Add for loop code

}

b) As a comment in the code above describe the scope of the variable i inside and outside the body of each version of each loop.

c) What is the minimum number of iterations for each type of loop? You can put this as a comment at the top of your code.
 
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  • #2
// The minimum number of iterations for a for loop is 0, for a do while loop is 1, and for a while loop is 0.
 

FAQ: Implementing Loops to Modify Code - Loop Modification

What is a loop in programming?

A loop is a programming construct that allows a set of instructions to be repeated a certain number of times or until a certain condition is met. This saves time and effort by eliminating the need to write the same code multiple times.

How can loops be used to modify code?

Loops can be used to modify code by allowing the same code to be executed multiple times with slight variations. This can be useful for tasks such as updating a list of items or performing calculations on a set of data.

What are some common modifications that can be made using loops?

Some common modifications that can be made using loops include adding or removing elements from a list, changing the value of a variable, or executing a different set of instructions depending on certain conditions.

Can loops cause errors in code?

Yes, if not used correctly, loops can cause errors in code. For example, if the loop condition is not properly defined, the loop may continue infinitely, causing the program to crash. It is important to thoroughly test and debug code that uses loops.

How can I determine the best type of loop to use for a specific task?

The best type of loop to use for a specific task depends on the nature of the task and the programming language being used. Some languages have specific types of loops, such as "for" or "while" loops, while others may have more advanced loop structures. It is important to understand the capabilities and limitations of each type of loop in order to choose the most appropriate one for a given task.

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