Question

编写程序,输出100与300之间的所有素数.

Answer 1

#include "stdafx.h"
#include <iostream>

using namespace std;

int _tmain(int argc, _TCHAR* argv[])
{
int p=0;
int n=0
for (int i=100; i<=300;i++)
{
for(int a=2;a<=(i-1);a++)
{
if(i % a ==0)
{
p++;
}
}
if (p==0)
{
cout<<i<<endl;
n++;
}
p=0;
}
cout<<endl
<<"一共有"<<n<<"个素数"
<<endl
<<endl
<<"P.S:"<<endl
<<"1是否算素数还有争议"<<endl
<<endl
<<endl;

system("pause");
return 0;
}

Answer 2

P:
var i:longint;
function pd(x:longint):boolean;
var i:longint;
begin
for i:=2 to trunc(sqrt(x)) do
if x mod i=0 then exit(false);
exit(true);
end;
begin
for i:=100 to 300 do
if pd(i) then write(i,' ');
writeln(#8);
end.

Answer 3

什么语言？