UVa1593_Allgnment_Of_Code

 /**

     start:    integer;    // begins hear

  stop: integer;  // ends here

   s: string;

  c:  char;  // temp

 **/                           //测试数据

 #include<iostream>

 #include<sstream>

 #include<string>

 #include<vector>

 using namespace std;

 vector<string> txt[];

 string code, tmp;

 int max_len[];            //储存每列最大的字符串长度

 void print(const string& s, int len, char extra)

 {

     cout << s;

     for (unsigned int i = ; i <= len-s.length(); i++)

         cout << extra;

 }

 int main()

 {

     int cols = , row = ;          //列数, 行数

     while (getline(cin, code))

     {

         istringstream ss(code);     //istringstream从string对象中读取

         while (ss >> tmp) {

             max_len[cols] = max(max_len[cols], (int)tmp.size()); //求出每行的每列上的最大字符串长度

             cols++;                                 //列数++

             txt[row].push_back(tmp);

         }

         row++; cols = ;                            //行数++, 列数归零

     }

     for (int i = ; i < row; i++)

     {

         unsigned int j = ;

         for ( ; j < txt[i].size() - ; j++)

         {

             print(txt[i][j], max_len[j], ' '); //输出单个字符串，长度不够的输出空格

         }

         cout << txt[i][j] << endl;             //每行每列

     }

     return ;

 }

这里有一篇关于:istringstream, ostringstream, stringstream的文章，感觉不错.

http://www.cnblogs.com/gamesky/archive/2013/01/09/2852356.html