Do ... while structure improvement

Sometimes the use of jumps such as: continue break goto call is necessary to avoid the execution of some instructions.

We suggest this improvement as a replacement for tricks like for(;;) if(condition)break; and jumps.

//allow initializers (extra improvement)

do(bool condition=0){

 //block A

}while(condition){

 //block B & initializer still visible

}

Example print arrays separating its elements

This code prints the content of an array, separating each of its elements by a comma, avoiding the printing of a comma after the last element.

#include<iostream>

using namespace std;


int main(){

 unsigned a[]={0,1,2,3,4,5,6,7,8,9};

 do(unsigned b=0){

  cout<<a[b];

 }while(++b<10){

  cout<<',';

 }

 cout<<endl;

 return 0;

}

Example auxiliary variables remain unchanged after last cycle

Sometimes a loop requires auxiliary variables, which change each cycle, but after the last one, they must either remain unchanged or it is useless to change them.

int main(){

 unsigned int loop1=0;

 unsigned int loop2;

 unsigned int result=0;

 unsigned int auxiliary1=1,auxiliary2=2,auxiliary3=3;

 while(loop1++<1000000000){

  //allow initializers (extra improvement)

  do(loop2=0){

   result+=auxiliary1;

   result-=auxiliary2;

   result*=auxiliary3;

  }while(++loop2<10){

   //auxiliaries remain unchanged

   auxiliary1+=auxiliary3;

   auxiliary2*=auxiliary1;

   auxiliary3-=auxiliary2;

  }

 }

 return 0;

}