用C编写一个程序，以显示两个自然数之间的所有现有质数[保持中]

#include<stdio.h>

int main(void)
{
    int a, b;
    //takes the two input numbers
    printf("Enter the two numbers\n");
    scanf("%d %d", &a, &b);
    //checks if the entered number is invalid
    if((a < 0) || (b < 0))
    {
        printf("Invalid numbers");
        return -1;
    }
    //for each number between a and b, checks either it is prime or not
    for(int i = a; i <= b; i++)
    {
        int count = 0;
        //counts the number of divisors of the number i with remainder 0
        for(int j = 1; j <= i; j++)
        {
            if(i % j == 0)
            {
                count++;
            }
        }
        //if number of divisors of the i is less than 3, which means the 
        //number is prime, it prints the number
        if(count < 3)
        {
            printf("%d ", i);
        }
    }
    return 0;
}