题目：一年中的第几天（哈西做法）
代码：
#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{

int y, m, d;
int s[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int n, i;
cin >> y >> m >> d;

cout << n << endl;
system("PAUSE");
return EXIT_SUCCESS;
}
大家参考一下吧！

灌水请移驾灌水帖 http://tieba.baidu.com/p/2480503636

#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
int s[500000], i, j, k;
int n;
cin >> n;
for ( i = 2; i <= n; i++ )
s[i] = 1;
for ( i = 2; i <= n; i++ )
{
if ( s[i] == 1 )
for ( j = 2 * i; j <= n; j += i )
s[j] = 0;
}
for ( i = 2; i <= n; i++ )
if ( s[i] == 1 )
{
cout << i << " ";
k++;
}
cout << endl << "共" << k << "个质数";
cout << endl;
system("pause");
return 0;
}

以上代码为筛法求质

AllanGong法

由他本人发布

#include <cstdlib>
#include <iostream>
#include <math.h>
using namespace std;
int main(int argc, char *argv[])
{
int i, j, n1, s[50001] = {};
double n;
for (i = 2; i <= 50000; i++)
{
s[i] = 1;
}
n = sqrt(50000);
for (i = 2; i <= n; i++)
{
if (s[i] == 0)
continue;
for (j = 2 * i; j <= 50000; j += i)
{
s[j] = 0;
n1++;
}
}
for (i = 2; i <= 50000; i++)
{
if (s[i] == 1)
cout << i << " ";
}
cout << endl;
cout << "共" << n1 << "个质数" << endl;
system("PAUSE");
return EXIT_SUCCESS;
}
我的比吴子睿522快。

#include <iostream>#include <cstring>#include <cstdlib>#include <cmath>
using namespace std;
int main(int argc, char *argv[]){ int n; int i; int a[ 200 ]; int m; int s( 0 ); cin >> n; for ( i = 1 ; i <= n ; i++ ) cin >> a[ i ]; i = 0; cin >> m; for ( i = 1 ; i<=n ; i++ ) if( a[ i ] > m ) s++; cout << s + 1 << endl; //system("PAUSE"); return EXIT_SUCCESS;}

题目：本次作业
#include <cstdlib>#include <iostream>#include <cmath>#include <cstring>
using namespace std;
int main(int argc, char *argv[]){ int n; int i; int j; int k; cin >> n; i = 0; while ( n != 0 ) { i = n % 2; n = n / 2; cout << i ; i = n; } cout << endl; system("PAUSE"); return EXIT_SUCCESS;}

早上好！