Alternative to writing the same code before the loop

Question

I want to make the for loop execute the code in the beginning. However, my beginning state is same as my ending state. Is there any way I can execute the code without writing it before the loop?

for(int i = queue1->front; 
    i%queue1->size != queue1->front; 
    i++) {
    //some code
}

In the code, I am using a circular array and I want to print that using a loop.

Answer 1

Aside from using a do-while-loop you could use a flag to enter the loop in any case like this:

int first = 1;
for (int i = queue1->front; i%queue1->size != queue1->front || first; i++){
    first = 0;
    //some code
}

You can even integrate it directly into the for loop header, if you like:

for (int i = queue1->front, f=1; i%queue1->size != queue1->front || f; i++, f=0) {