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7-e.c
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7-e.c
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#include<stdio.h>
int main()
{
int a, b, i,temp,iii=0,j,n=0;//a b临界值,i是测试区间的每个数,temp搓每一位数临时用,iii记录测试数的位数,hw[n]
int hw[2000] = { 0 }, ery[6] = { 0 }, zs[2000] = { 0 };
scanf("%d %d", &a, &b);//输入边界
for (i = a; i <= b; i++)//查回文数,存到hw
{
int k=0;
temp = i;
for (int ii = 0; ii <6; ii++)//把数的每一位搓到ery
{
ery[ii] = temp % 10;
if (temp < 10)break;
temp = temp / 10;
iii++;
}
for (j = 0; j < iii +1/ 2; j++)
{
if (ery[j] == ery[iii - j]) k++;//如果相同的数字对数=1/2位数
}
if (k == iii+1 / 2)
{
hw[n] = i;
n++;
}
iii = 0;
}
//for (j = 0; j < 2000; j++)//测试回文数用
//{
// if (hw[j] == 0) break;
// printf("%d\n", hw[j]);
//}
for (j = 0; j < 2000; j++)
{
int q = 2;
for (int m = 2; m < hw[j]/2; m++)
{
if (hw[j] % m != 0) q++;
}
if (q == hw[j] / 2) printf("%d\n", hw[j]);
}
}