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[1314];
string code, tmp;            
int max_len[200];            //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 = 0; i <= len-s.length(); i++)
        cout << extra;
}

int main()
{
    int cols = 0, row = 0;          //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 = 0;                            //行数++, 列数归零 
    }
    for (int i = 0; i < row; i++)
    {
        unsigned int j = 0;
        for ( ; j < txt[i].size() - 1; 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 0;
}

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