【学习笔记】学习C++Primer时练习的代码

// #include <iostream>

#include "Sales_item.h"
#include <string>
#include <vector>

using std::cin;
using std::cout;
using std::string;
using std::endl;
using std::vector;
int main()
{
    vector<string> text;
    string word;
    cout <<"please input some word" <<endl;
    while(cin>>word)
    {
        for(string::size_type i=0;i!=word.size();++i)
            word[i]=toupper(word[i]);
          text.push_back(word);

    }
    for(vector<string>::size_type i=0;i!=text.size();++i)
    {
        cout<<text[i]<<" ";
        if((i+1)%8==0)
            cout<<endl;
    }
    cout<<endl;

    /*vector<int> numbers;
    int a;
    vector<int>::size_type i;
    cout<<"please input a lot of integer"<<endl;
    while(cin>>a)
    {
        numbers.push_back(a);

    }

    for(i=0;i<numbers.size()/2;++i)
    {
        cout<<numbers[i]+numbers[numbers.size()-(i+1)]<<endl;
    }
    if(numbers.size()%2!=0)
    {
        cout<<"the mid mumber "<<numbers[i]
        <<" is not taking part in plus"<<endl;
    }
    //另外一种还不错的写法
    for(vector<int>::size_type first=0,last=numbers.size()-1;first<last;++first,--last)
    {
        cout<<numbers[first]+numbers[last]<<endl;
    }
    if(first==last)
    {
        cout<<"the mid number "<<numbers[first]
        <<"is not taking part in plus"<<endl;
    }

    */
    /* for(vector<int>::size_type i=0;i<numbers.size()-1;i=i+2)
    {
        cout<<numbers[i]+numbers[i+1]<<endl;
    }
    if(numbers.size()%2!=0)
        cout<<"the last number "<<numbers[numbers.size()-1]
            <<" is not taking part in plus "<<endl;
     */


    /*string word;
    vector<string> text;

    cout<<"please input some word,then these word will push into the text"<<endl;
    cout<<"Enter (CTRL+Z) to end"<<endl;

    while(cin>>word)
    {
        text.push_back(word);
    }
    for(vector<string>::size_type i=0;i<text.size();++i)
        text[i]="";
    cout<<text[0]<<endl;*/
    //string s;
    //cout <<s[0]<<endl;
    /*string s,s1;
    cout <<"please input string should combine punctuation!"<<endl;
    while(getline(cin,s))
    {
        s1="";
        for(string::size_type i=0;i < s.size();++i)
            if(!ispunct(s[i]))
               s1+=s[i];
        cout<<"new string "<<s1<<endl;
        cout <<"please input string should combine punctuation!"<<endl;
    }*/
    /*string str,str1;

    cout << "please input some strings!! "<<endl;

    while(cin >> str1)
    {
        str+=str1;
        str+=" ";
    }
    cout <<"these strings combine to "<<str<<endl;*/
    /*string str1,str2;

    cout << "please input two string ,Then I will show the answer to you !"<<endl;

    while(cin>>str1>>str2)
    {
        if(str1==str2)
            cout <<"str1 == str2"<<endl;
        else if(str1 > str2)
            cout << "str1 > str2"<<endl;
        else
            cout <<"str1 < str2"<<endl;
        cout << "please input two string ,Then I will show the answer to you !"<<endl;
    }*/
    /*string line;
    int n;
    string s("Hello World!!!");
    string::size_type punct_cnt=0;

    //string str("some string");
    for(string::size_type i=0;i<s.size();++i)
    {
        s[i]=tolower(s[i]);
        if(ispunct(s[i]))
            ++punct_cnt;
    }
    cout << "punctuation characters in " << s <<"is "<< punct_cnt<<endl;
    */

 /*
    while(getline(cin,line))
    {
        if(line.empty())
        {
            cout << "line is empty" <<endl;
        }
        n=line.size();
        cout << line.size() << endl;
        cout << n <<endl;
        cout << line << endl;
    }*/

    /*string s1,s2;
    cout << "please input string !" <<endl;
    while(cin >> s1)
    {
        cout << s1 <<endl;
        cout << "please input string" <<endl;
    }*/
    //cin >> s1 >> s2;
    // cout << s1 << s2 << endl;
    /*Sales_item total,item;
    //int count=1;
    //int i=1;
    int i=2.1;
    std::cout<<i<<std::endl;
    const int &r=1;
    const int &r2=r+i;
    unsigned char u=-1;
    cout<<r2<<r<<std::endl;*/
    //std::cout<<i%256<<std::endl;
    /*if(std::cin>>total)
    {
    while(std::cin>>item)
    {
        if(total.same_isbn(item))
        {
            total+=item;
        }
        else
        {
            std::cout<<total<<std::endl;
            total=item;

        }
    }
    std::cout<<total<<std::endl;
    }
    else
    {
        std::cout<<"No numbers"<<std::endl;
        return -1;
    }*/
    /*std::cin>>total;
    while(std::cin>>item)
    {
        if(total.same_isbn(item))
            ++count;
        else
        {
            std::cout<<"the countof the previos ISBN is "<<count<<std::endl;
            total=item;
            count=1;
        }
    }
    std::cout<<"the count of the last ISBN is"<<count<<std::endl;*/



    /*std::cin>>item1>>item2;

    if(item1.same_isbn(item2))
    {
        std::cout<<item1+item2<<std::endl;
    }
    else
    {
        std::cout<<"error"<<std::endl;
    }*/
    /*std::cout<< "enter two numbers" <<std::endl;
    int v1,v2;
    std::cin>>v1>>v2;
    std::cout<<"the sum of"<<v1<<"and"<<v2<<"is"<<v1+v2<<std::endl;*/
    return 0;
}