2017--7--29 考试分析

排序1

#include<iostream>
using namespace std;
int main()
{
    int a,b,c,d,e,x;
    cin>>a>>b>>c>>d>>e;
    if(a<b)
    {
       x=a;  a=b;  b=x;
    }
    if(a<c)
    {
       x=a;  a=c;  c=x;
    }
    if(a<d)
    {
       x=a; a=d;  d=x;
    }
    if(a<e)
    {
    x=a; a=e; e=x;
    }
    if(b<c)
    {
    x=b; b=c; c=x;
    }
    if(b<d)
    {
    x=b; b=d; d=x;
    }
    if(b<e)
    {
    x=b; b=e;  e=x;
    }
    if(c<d)
    {
    x=c; c=d; d=x;
    }
    if(c<e)
    {
    x=c; c=e; e=x;
    }
    if(d<e)
    {
    x=d; d=e; e=x;
    }
    cout<<e<<‘ ‘<<d<<‘ ‘<<c<<‘ ‘<<b<<‘ ‘<<a<<endl;
    return 0 ;
}

排序2

#include<iostream>
#include<iomanip>
#include<cmath>
#include<cstdio>
using namespace std;
int main()
{
    freopen("distance.in","r",stdin);
    freopen("distance.out","w",stdout);
    cout<<setiosflags(ios::fixed)<<setprecision(2);
    int x1,y1,x2,y2;
    double a,b;
    cin>>x1>>y1>>x2>>y2;
    a=sqrt( ( (x1-x2)*(x1-x2)+(y1-y2)*(y1-y2) )*1.0);  cout<<a<<endl;
    b=(x1-x2)+(y1-y2);  {if(b>=0)    cout<<b<<endl;
                         else        cout<<-b<<endl;}

    return 0;
}

求距离1

#include<iostream>
#include<cstdio>
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{
    freopen("distance.in","r",stdin);
    freopen("distance.out","w",stdout);
    cout<<setiosflags(ios::fixed)<<setprecision(2);
    int xx1,xx2,yy1,yy2;
    cin>>xx1>>yy1>>xx2>>yy2;
    double c,d,e,f;
    c=sqrt(1.0*(xx1-xx2)*(xx1-xx2)+1.0*(yy1-yy2)*(yy1-yy2));
    if(xx1<xx2)
        d=xx2-xx1;
    else
        d=xx1-xx2;
    if(yy1<yy2)
        e=yy2-yy1;
    else
        e=yy1-yy2;
    f=d+e;
    cout<<c<<endl<<f<<endl;
    return 0;
}

求距离2

#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
    freopen("task.in","r",stdin);
    freopen("task.out","w",stdout);
    int a,b;
    cin>>a>>b;
    if(a+b<10)
        cout<<"water"<<endl;
    if(a+b>=10&&a>b)
        cout<<"tree"<<endl;
    if(a+b>=10&&a<=b)
        cout<<"tea"<<endl;
    return 0;
}

任务分配

#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
    freopen("snail.in","r",stdin);
    freopen("snail.out","w",stdout);
    int D,a,b,x=0;//x是计数器
    cin>>D>>a>>b;
    if(a<=b&&D>a)
        cout<<"bye bye"<<endl;
    else
    {
        for(;;)
        {
            x++;
            D-=a;
            if(D<=0)
                break;
            D+=b;
        }
        cout<<x<<endl;
    }
    return 0;
}

蜗牛出井

这次考试是班里的后几名，怎么说呢，很难受，觉得打击挺大的。但是通过这四天的学习，我觉得我还是有很大的收获的。我的一道0分题是因为文件输入输出的格式错误，这种错误很低级，以后需要注意一定要避免这种错误，这种错误是最让人后悔的。还有一道20分的题是因为自己没有吧各种情况考虑周全，以后编程的时候一定要先把这道题当作一道数学题先把它做出来，然后再用编程语言写在计算机上。