Question

I have some code as following:

#include <stdio.h>
#include <stdlib.h>

static counter = 0;
static flag = 0;

int main()
{
    int number = 3;
    int i = 0;
    for(i; i< number; i++)
    {
        if(counter >= number)
        {
            counter = 0;
            flag = 1;
        }
        counter ++;

        printf("   counter = %u\n", counter);
        printf("   flag = %u\n", flag);

    }



    return 0;
}

everytime when the counter reach 3, the flag should be 1, but why when counter reach 3, the flag is still 0?

Answer 1

You loop runs only 3 times. In the last iteration, during the if test, value of counter is 2 and value of number is 3. And the if test fails. Now counter is incremented to 3 which is what is printed.