实验七

11-3 | 4 | 7

#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
using namespace std;

int main()
{
    ios_base::fmtflags original_flags=cout.flags();//保存现在的格式化参数的设置
    cout<<812.000<<'|';
    cout.setf(ios_base::left,ios_base::adjustfield);//对齐方式为左对齐
    cout.width(10);//以长度为 10 的格式输出
    cout<<813<<815.0<<'\n';
    cout.unsetf(ios_base::adjustfield);//清除对齐方式
    cout.precision(2);
    cout.setf(ios_base::uppercase|ios_base::scientific);//以科学计数法的格式输出浮点数，显示 E
    cout<<813.0;
    cout.flags(original_flags);//恢复初始参数
    cout<<endl;
    ofstream output("test1.txt");
    if(output)
    {
        output<<"Write data to file successfully !/已成功写入文件！";
    }
    output.close();
    ifstream input("test1.txt");
    if(input)
    {
        string s;
        getline(input,s);
        cout<<s;
    }
    return 0;
}

call the roll :

#include <iostream>
#include <cstring>
#include <time.h>
#include <fstream>
#include <sstream>
#include <string>
#include <windows.h>
#include <vector>
#include <conio.h>
using namespace std;

bool breorcon()
{
    // string a;
    // getline(cin,a);
    if(_kbhit())//找了好久才找到，_kbhit()返回缓存区是否为空，空返回 0 ，非空返回 1
    {
        cin.sync();
        cin.clear();
        return false;
    }
    return true;

}

string generatetime()//利用WindowsAPI获取系统时间
{
    SYSTEMTIME sys;
    GetLocalTime(&sys);
    int pl;
    string m="";
    pl=sys.wYear;   m+=to_string(pl);
    pl=sys.wMonth;  if(pl<10)m+="0";    m+=to_string(pl);
    pl=sys.wDay;    if(pl<10)m+="0";    m+=to_string(pl);
    pl=sys.wHour;   if(pl<10)m+="0";    m+=to_string(pl);
    pl=sys.wMinute; if(pl<10)m+="0";    m+=to_string(pl);
    pl=sys.wSecond; if(pl<10)m+="0";    m+=to_string(pl);
    return m;
}


void scanfileall(string n)//一次性读取文件并输出（这个程序没用到）
{
    string s;
    ifstream in(n);
    ostringstream tmp;
    tmp<<in.rdbuf();
    s=tmp.str();
    cout<<s;
}


int randomnum(int a,int b)//产生随机数
{
    // srand((unsigned)time(nullptr));
    // int d=rand()%3600+10;
    // Sleep(d);
    srand((unsigned)time(nullptr));
    int c=rand()%2000+1000;
    Sleep(c);
    srand((unsigned)time(nullptr));
    c=rand()%(b-a)+a;
    return c;
}


void roll(string trollfile)//主要功能函数
{
    trollfile+=".txt";
    int rollnum=0,a=0;
    string s;
    vector<vector<string>> list,rolist;


    string base="roll_";
    base+=generatetime();
    base+=".txt";
    ifstream input(trollfile);
    ofstream output(base);
    if(output)
        cout<<"Create data file successfully."<<endl;
    else
        cout<<"Error! Can not create/open the data file."<<endl;


    if(!input)
        cout<<"Fail to open file / file may be not exist or be moved ."<<endl;
    else
    {
        cout<<"Scanning the orignal file..."<<endl;
        while(getline(input,s))
        {
            istringstream scin(s);
            list.push_back(vector<string>());
            for(int k=0;k<4;k++)
            {
                list[a].push_back(string());
                scin>>list[a][k];
            }
            a++;
        }
    }
    input.close();
    int rolljudge[a+1]={0};



    cout<<"Press any key to stop."<<endl;
    do
    {
        int k=randomnum(1,a+1);
        if(rolljudge[k]==0)
        {
            rolist.push_back(vector<string>());
            for(int j=0;j<4;j++)
            {
                rolist[rollnum].push_back(list[k][j]);
                cout<<rolist[rollnum][j]<<"      ";
            }
            cout<<endl;
            rolljudge[k]=1;
            rollnum++;
        }
        else continue;
    }while(breorcon());
    cout<<"Over the call."<<endl;

    cout<<"Start write the roll data into the file..."<<endl;
    for(int i=0;i<rollnum;i++)
    {
        for(int j=0;j<4;j++)
            output<<rolist[i][j]<<"     ";
        output<<endl;
    }
    cout<<"Over write."<<endl;
}

int main()
{
    string classname;
    while(1)
    {
        cout<<"Input the name of file : ";
        cin>>classname;
        roll(classname);
    }
    return 0;
}

Collection :

#include <iostream>
#include <sstream>
#include <fstream>
#include <string>
#include <cstring>
using namespace std;


void scanall(string n,int *p)
{
    string k,s,a;
    n+=".txt";
    ifstream in(n);
    ostringstream tmp;
    tmp<<in.rdbuf();
    istringstream fin(tmp.str());
    while(getline(fin,s))
    {
        p[2]++;
        istringstream scin(s);
        while(scin>>a)
        {
            p[1]++;
            p[0]+=a.size();
        }
    }
}
int main()
{
    string n,j,pin;
    while(1)
    {
        cout<<"Enter the name of the file: "<<endl;
        cin>>n;
        int num[3]={0};
        scanall(n,num);
        cout<<"Please input the name of the thing you want to know ,"<<endl
            <<"like 'words' to get the number of words of the text."<<endl;
        while(cin>>j)
        {
            if(j=="letters")
                cout<<"Number of letters : "<<num[0]<<endl;
            else if(j=="words")
                cout<<"Number of words : "<<num[1]<<endl;
            else if(j=="sentences")
                cout<<"Number of sentences : "<<num[2]<<endl;
            else
                break;
        }
    }

    return 0;
}