如果一個正整數是素數，它的反位數也是素數，則稱這樣的數為絕對素數。 如需繼續瞭解，請檢視百度百科絕對素數

#include<stdio.h>
#include<math.h>
int prime(unsigned int);
int main()
{
	unsigned int n, m;
	scanf("%u",&n);
	if(prime(n) != 0)
	    m =rev(n);
	else
	{
	    printf("輸入的數%u不是素數\n",n);
	    return 0;
	}
	if(prime(m) !=0)
	    printf("%u是絕對素數！\n"
 
,n);
	else
	    print("%u不是絕對素數！\n",n);
	return 0;
}
//求絕對素數的定義
int prime(unsigned int x)
{
    int i, k;
    k = sqrt(x);
    for(i = 2; i <= k; i++)
    {
        if(x % i == 0)
            return 0;
        else if(i > k)
            return 0;
    }
}
//求反位數的函式定義
unsigned int rev(unsigned int y)
{
    unsigned
 
 int z = 0;
    while(y != 0)
    {
        z = z * 10 + y % 10;
        y = y / 10;
    }
    return 0;
}