Question

This is a small piece of code shown below which is using do while loops.
I really dont understand the unexpected behaviour i see when i execute this code.This code shown below uses a do while loop condition and from my knowledge a do while loops executes in such a way that if first executes the statement and then checks in the while part if the condition is true or not.But when i execute this code it never comes out of the loop and goes on forever.Can anyone please tell me why is it happening?

           unsigned int A = 5;
           int B = 0;
           main()
          {
               do
               {
                   A = A + 5;
                   B = B - 1;
               }while(B > A);

           printf("hello\n");
          }

Now i never get the “hello” printed.

Thanks in advance
Maddy

Answer 1

prints “hello” for me. takes a while (well, a second or two).

modified to this…

void main()
{
    unsigned int A = 5;
    unsigned int loop = 0;
    int B = 0;
    do
    {
        A = A + 5;
        B = B - 1;
        loop++; 
    }while(B > A);

    printf("hello %d  %d %d\n", B, A, loop);
}

prints out :-

hello -715827882  -715827881 715827882