Introduction - If you have any usage issues, please Google them yourself
#include<stdio.h>
int main()
{
int i,n,mark=0
printf("请输入一个整数:",n)
scanf(" d",&n)
for(i=2 i<n/2+1 i++)
{
if(n i==0)
{
printf(" d不是素数",n)
mark=1
break
}
}
if(mark==0)
printf(" d是素数",n)
return 0
}