C language Changing For Loop to While loop

问题

How to make for loop to while loop
Is it possible to change for loop in array to while loop?

change

for(i = 0; i < 12; ++i) //for loop for selecting only positive
    {
        if(a[i] > 0) printf("%d ", a[i]); //display positive only using if statement
    }

to

int i = 0, a[12];
    while(i < 12)
    {
        if(a[i] > 0)
        {
            printf("%d ", a[i]);
        }
        i++;
    }

but it doesn't display the positive same as the negative if changed..

回答1:

int i;
for(i=0; i < count; i++)
{
    // Work item here
}

is functionally equivalent to

int i=0;
while (i < count)
{
    // Work item here
    i++;
}

来源：https://stackoverflow.com/questions/64972464/c-language-changing-for-loop-to-while-loop