...输出两数之间的素数及其个数,输出要求每5个数一换行"答:{int i;for(i=2;i*i<=n;i++)if(!(n%i))return 0;return n>1;} int main(){int i,a,b,n=0;scanf("%d%d",&a,&b);for(i=a;i<=b;i++)if(isprime(i)){printf("%d ",i);if(++n%5==0)printf("\n");} printf("\n%d~%d之间的素数个数=%d\n",a,b,n);return...