Translate flowchart to c++ code

Question

I have a problem translating this flowchart below to C++ code.

It should probably look somewhat like this (I know it's wrong for now):

do {
  I1;
  if(!W1) {
      I2;
  ...
  }
}

I1, I2, I3 are instructions. I think I should use boolean variables to do it correctly, but how?

Answer 1

There is a loop in the flow chart. The condition for stopping the loop is in fact W1.

while (!W1())
{
}

I1 is executed (initially) regardless, and is performed before the loop finish condition check, so let's update the code:

I1();
while (!W1())
{
}

Again, I2 is performed uncoditionally:

I1();
while (!W1())
{              
   I2();
}

Now, W2 affects whether we execute I1 or I3, let's update the code accordingly:

I1();  // for the first, unconditional execution
while (!W1())
{
   I2();
   if (W2())
      I1();
   else
      I3();
}