我是初學者
是用VC++2005Express寫的
請幫我看看這隻程式:
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#include<iostream>
#include<stdlib.h>
using namespace std;
int main()
{
int count=0;
int n;
int r;
int j;
int x;
do{
cout<<"Please input an integer(Input -1 to exit):";
cin>>n;
for(r=n^(1/2);r>1;r--)
{
j=n%r;
count+=1;
if(j!=0)
x=1;
else if(j==0)
x=2;
else
x=3;
}
if(x==1)
cout<<"
Prime
";
else if(x==2)
cout<<"
Not prime
";
else
cout<<"
Encounter an error
";
}while(n==-1);