How do you Make A Repeat-Until Loop in C

Question

How do you Make A Repeat-Until Loop in C    As opposed to a standard While or For loop  I need to check the condition at the end of each iteration  rather than at the beginning

User · Answer

You could use macros to simulate the repeat-until syntax    define repeat do  define until exp  while   exp

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Repeat is supposed to be a simple loop n times loop    a conditionless version of a loop    define repeat n  for  int i   0  i  lt  n  i      repeat 10          do stuff     you can also also add an extra barce to isolate the i variable even more   define repeat n    for  int i   0  i  lt  n  i      define endrepeat    repeat 10          do stuff   endrepeat     edit  Someone posted a concern about passing a something other than a value  such as an expression  just change to loop to run backwards  causing the expression to be evaluated only once   define repeat n    for  int i    n   i  gt  0  --i

User · Answer

do         whatever   while    condition

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When you want to check the condition at the beginning of the loop  simply negate the condition on a standard while loop   while  cond            If you need it at the end  use a do     while loop and negate the condition   do         while  cond

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Just use   do       enter code here   while    condition      So what this does is  it moves your  check for condition  part to the end  since the while is at the end  So it only checks the condition after running the code  just like how you want it

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For an example if you want to have a loop that stopped when it has counted all of the people in a group  We will consider the value X to be equal to the number of the people in the group  and the counter will be used to count all of the people in the group  To write the  while  condition   the code will be   int x   people  int counter   0  while x    counter    counter      return 0

[c++] How do you Make A Repeat-Until Loop in C++?

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