stl string 小练习

最近没啥可写的这里写下做的STL小练习作为记录

去除指定字符串中的空格

获取文件名并根据名字创建临时文件，以TMP后缀结尾，已经为TMP后缀结尾文件则创建以XXX后缀结尾文件

读取一行输入内容并将单词翻转打印

100

101

102

103

104

105

106

// 1111.cpp : 定义控制台应用程序的入口点。
//
 
#include "stdafx.h"
#include <string>
#include <iostream>
#include <algorithm>
 
 
using namespace std;
 
string strArray[5] = {"prog.dat","mydir","hello.","oops.tmp","end.dat"};
 
string TrimSpace(string str)
{
 
        string::size_type i;
 
        while( (i = str.find(" ")) != string::npos )
        {
            str.replace(i,1,"");
        }
 
    string::iterator newEnd = remove(str.begin(),str.end(),' ');
    str.erase(newEnd,str.end());
 
    return str;
}
 
void ReversPrintWordInLine()
{
    const string delims(" \t,.;");
    string line;
    while(getline(cin,line))
    {
        string::size_type begIdx,endIdx;
        begIdx = line.find_first_not_of(delims);
        while(begIdx != string::npos)
        {
            endIdx = line.find_first_of(delims,begIdx);
            if(endIdx == string::npos)
            {
                endIdx = line.length();
            }
            for(int i = endIdx-1;i >= static_cast<int>(begIdx);--i)
            {
                cout << line[i];
            }
            cout << ' ';
 
            begIdx = line.find_first_not_of(delims,endIdx);
        }
        cout << endl;
    }
}
 
void CreateTmpFilename()
{
 
    string filename,basename,extname,tmpname;
    const string suffix("tmp");
 
    for(int i = 0;i < 5;++i)
    {
        string::size_type idx = strArray[i].find(".");
        if(idx == string::npos)
        {
            tmpname = strArray[i]+"."+suffix;
        }else
        {
            basename = strArray[i].substr(0,idx);
            extname = strArray[i].substr(idx+1);
            if(extname.empty())
            {
                tmpname = strArray[i];
                tmpname += suffix;
            }else if(extname == suffix)
            {
                tmpname = strArray[i];
                tmpname.replace(idx+1,extname.size(),"xxx");
            }else
            {
                tmpname = strArray[i];
                tmpname.replace(idx+1,suffix.size(),suffix);
            }
        }
 
        cout << strArray[i] << " ==> " << tmpname << endl;
    }
    cout << endl;
}
 
 
int _tmain(int argc, _TCHAR* argv[])
{
    string str = TrimSpace(" sdfsf sdfs sdf ");
    cout << "remove space " << str << endl << endl;
 
    CreateTmpFilename();
 
 
    ReversPrintWordInLine();
 
 
    return 0;
}