C语言版: #include #include void main() { int i,m,k; printf("please input a number:\n"); scanf("%d",&m); k=(int)sqrt(m); for(i=2; ik)printf("%d is a prime number.\n",m); else printf("%d is not a prime number.\n",m); } C++版: #include #include void main() { int i,m,k; cout