#include <stdio.h>
#include<stdlib.h>
int main()
{
int i,n,j=0;
printf("请输入若干个正整数:\n");
while(scanf("%d",&n))//循环输入若干个数
{
j++;//输出使5个数一行
if(n<2) printf("合数");
for(i=2;i<n;i++)
{
if(n%i==0)
break;
}//判断是否为素数
if(n==i)
{
printf("%d ",n);//把是素数的输出
if(j%5==0) printf("\n");//输出使5个数一行
}
}
system("pause");
return 0;
}
Input any number of positive integers, determine whether they are prime numbers and output
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Origin blog.csdn.net/lyz1_2_3/article/details/105764790
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