POJ 1057 FILE MAPPING
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1. 这道题根本不会做,直接看的别人的解体报告,看了别人的解题报告的算法说明,还是不会做,只好看代码了;
2. 这篇博客写得比我写得好(http://jovesky.info/blog/2011/08/12/poj-1057-file-mapping-c-edition/),我就是看人家的看懂的;
3. 递归+vector,一层套一层,以后还得看看怎么做的。现在思路会了,但是vector还是不会用,上午刚看了primer还是不会用,另外细节问题很繁琐,日后就是为了学递归也得再做一遍这道题。
#include <iostream>#include <string>#include <vector>#include <algorithm>using namespace std;struct node{ vector<string> file; vector<node> dir; string name;};int end = 0;void fileinput(node &now){ string tmp; while (1) { cin >> tmp; if (tmp[0] == '#') { end = 1; break; } else if (tmp[0] == 'f') now.file.push_back(tmp); else if (tmp[0] == 'd') { node d; d.name = tmp; fileinput(d); now.dir.push_back(d); } else break; } sort(now.file.begin(), now.file.begin() + now.file.size()); return;}void fileoutput(node now, int n){ int i, j; for (i = 0; i < n; i++) cout << "| "; cout << now.name << endl; for (i = 0; i < (int)now.dir.size(); i++) fileoutput(now.dir[i], n + 1); for (i = 0; i < (int)now.file.size(); i++) { for (j = 0; j < n; j++) cout << "| "; cout << now.file[i] << endl; } return;}int main(){ int cases = 1; while (cases) { node root; root.name = "ROOT"; fileinput(root); if (end) break; cout << "DATA SET " << cases << ':' << endl; fileoutput(root, 0); cases++; cout << endl; } return 0;}
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