Question

'AfxBeginThread': none of the 2 overloads can convert parameter 1 from type 'unsigned int (void *)

int n=0;
UINT Calculateprime(LPVOID pParam)
{
n=0;
long m,k,i;
for(m=1;m<=1000000;m=m+2)
{
k=(long)sqrt(m);
for(i=2;i<=k;i++)
if(m%i==0)break;
if(i>=k+1)n=n+1;
}
// return 0;
}
void CLi10_2View::OnPrime()
{
// TODO: Add your command handler code here
AfxBeginThread(Calculateprime,(LPVOID)n,THREAD_PRIORITY_BELOW_NORMAL,0);
CString str;
str.Format("The Prime Numbers from 1 to 1000000 is %d.",n);
AfxMessageBox(str);
}

Answer 1

pParam : 传递入线程的参数，注意它的类型为：LPVOID，所以我们可以传递一个结构体入线程.
你这里n要改下，&n