http://oj.leetcode.com/problems/text-justification/
编译代码要看warnings!它提供了可能出问题的情况，比如类型转换上unsigned int < int的比较，要用计算机的思维。这道题终究还是没有AC，差不多就这样吧。
要养成好的代码习惯，可以一边写代码，一边debug。注意变量命名之类的，常规问题。
Good good study!
1 #include <iostream> 2 #include <vector> 3 #include <string> 4 using namespace std; 5 6 class Solution { 7 public: 8 vector< string> fullJustify(vector <string> & words, int L) { 9 // IMPORTANT: Please reset any member data you declared, as 10 // the same Solution instance will be reused for each test case. 11 int alreadylen = 0; 12 int beginindex = 0,endindex = 0; 13 int averagespace = 0,firstspace = 0; 14 vector<string > result; 15 16 string onepiece(""); 17 for(unsigned int index = 0;index<words.size();index++) 18 { 19 beginindex = endindex = index; 20 alreadylen = 0; 21 22 while((index<words.size())&&( static_cast<int>(words[index].size()) <= (L-alreadylen))) 23 { 24 int wordsindexsize = words[index].size(); 25 alreadylen += words[index].size()+1; 26 index++; 27 } 28 29 endindex = index; 30 31 if(beginindex == endindex-1) 32 { 33 onepiece.clear(); 34 onepiece = words[beginindex]; 35 if(L -words[beginindex].size()>0) 36 onepiece.append( L-words[beginindex].size(),' '); 37 } 38 else if(index != words.size()+1 && index!=words.size()) 39 { 40 onepiece.clear(); 41 averagespace = (L-alreadylen+1)/(endindex-beginindex-1); 42 firstspace = averagespace + (L -alreadylen+1)%(endindex-beginindex-1); 43 44 for(int tt = beginindex;tt<endindex;tt++) 45 { 46 onepiece +=words[tt]; 47 if(tt==beginindex) 48 onepiece.append(firstspace+1,' ' ); 49 else if(tt!= endindex -1) 50 onepiece.append(averagespace+1,' ' ); 51 } 52 } 53 else 54 { 55 onepiece.clear(); 56 int alreadylength = 0; 57 for(int tt = beginindex;tt<endindex;tt++) 58 { 59 60 onepiece += words[tt]; 61 alreadylength += words[tt].size(); 62 if(tt!=words.size()-1) 63 { 64 onepiece.append(1,' ' ); 65 alreadylength++; 66 } 67 else 68 onepiece.append(L-alreadylength,' ' ); 69 70 } 71 72 } 73 index--; 74 result.push_back(onepiece); 75 } 76 return result; 77 } 78 }; 79 80 81 int main() 82 { 83 Solution *mySolution = new Solution(); 84 85 //words: [This, "is", "an", "example", "of", "text", "justification."] 86 //L: 16. 87 vector<string > words; 88 89 /*words.push_back( "this"); 90 words.push_back( "is"); 91 words.push_back( "an"); 92 words.push_back( "example"); 93 words.push_back( "of"); 94 words.push_back( "text"); 95 words.push_back( "justification."); */ 96 words.push_back( "what"); 97 words.push_back( "must"); 98 words.push_back( "be"); 99 words.push_back( "shall"); 100 words.push_back( "be."); 101 vector<string > output; 102 output = mySolution->fullJustify(words,12); 103 for(unsigned int i = 0;i<output.size();i++) 104 cout<<output[i]<<endl; 105 106 return 0; 107 }