int main()
{
int i;
int e = 0;
int count = 0;
printf("请输入求素数的范围最大值：");
scanf("%d", &e);
for (i = 0; i <= e; i++)
{
int n = 2;
for (n = 2; n <= i; n++)
//for(n=2;n<=sprt(i);n++)用开平方法简化计算过程
{
if (i % n == 0)
break;
}
if (i == n)
//if(n>sqrt(i)) 引用库函数<math.h>
{
printf("%d ", i);
count++;
}
}
printf("\ncount = %d", count);
return 0;
}