星期三, 九月 23rd, 2009 | Author: admin

这两天在准备保送到交大软院,由于要考机试,这两天狂练C++中,把自己的代码贴出来吧,不能再懒了,再懒博客就要荒废了。

题目:
Problem A. Prime Number
Input file: Standard Input Page 1 of 2
Output file: Standard Output
Time Limit: 1 Second
Output the k-th prime number.

Input
k≤10000

Output
The k-th prime number.

Sample input and output
Standard Input Standard Output
3 5
7 17

C++代码:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include <iostream>
#include <cmath>
using namespace std;
 
int isPrime(int n)
{
	int i,flag = 1;
	for (i=2;i<=sqrt(n);++i)
	{
		if (n % i == 0)
		{
			flag = 0;
			break;
		}
	}
	return flag;
}
 
int main()
{
	int i = 1,n = 2,k,result;
	cin >> k;
	while(i <= k)
	{
		result = n++;
		if (isPrime(result))
			++i;
	}
	cout << result;
}
Category: 算法
You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
Leave a Reply