#12049: 這題很簡單吧........C++
a121. 質數又來囉
| From: [134.208.255.201] |
發表日期
:
2017-05-20 23:25
#include<iostream>
using namespace std;
int main()
{
int a, b, prime, count;
while ( cin >> a >> b ) {
count = 0;
for ( int i = a; i <= b; i++ ) {
prime = 1;
for ( int j = 2; j * j <= i; j++ ) {
if ( i % j == 0 ) {
prime = 0;
break;
}
}
if ( prime == true && i != 1 )
count++;
}
cout << count << endl;
}
return 0;
}
#13979: Re:這題很簡單吧........C++
fdhs107HandsomeKenny
(Kenny Hsu)
學校
:
桃園市私立復旦高級中學
編號 : 69322
來源 : [123.195.59.129]
最後登入時間 ：
2024-11-14 20:33:21
a121. 質數又來囉
| From: [203.64.191.207] |
發表日期
:
2018-05-24 09:28
#include
using namespace std;
int main()
{
int a, b, prime, count;
while ( cin >> a >> b ) {
count = 0;
for ( int i = a; i <= b; i++ ) {
prime = 1;
for ( int j = 2; j * j <= i; j++ ) {
if ( i % j == 0 ) {
prime = 0;
break;
}
}
if ( prime == true && i != 1 )
count++;
}
cout << count << endl;
}
return 0;
}
負數怎麼辦????????
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