#include main() { int m,i,k; scanf("%d",&m); k=sqrt(m); for(

#include main() { int m,i,k; scanf("%d",&m); k=sqrt(m); for(i=2;i=k+1)
printf("%d is a prime number\n",m);
else
printf("%d is not a prime number\n",m);
getch();
}
这个程序是判断一个数是不是素数,在 for 语句中i=k+1

for(i=2;i