# include<stdio.h>
int main()
{
int a, i;
for (i = 1; i <= 50; i++)
{
for (a = 2; a < 50; a++)
if (i % a == 0)break;
if (i != a)continue;
printf("%5d", i);
}
}
原文：https://www.cnblogs.com/Zoeun/p/12295250.html