问题描述

请问大神这个程序怎么写，主要是不知道 文件名怎么传

解决方案

 #include<iostream>#include<vector>using namespace std;int main(){    vector<double> vec_num;    vec_num.push_back(1.1);    vec_num.push_back(1.5);    vec_num.push_back(1.2);    vector<double>::reverse_iterator re_it;    for(re_it = vec_num.rbegin(); re_it != vec_num.rend(); re_it++)        cout << *re_it << endl;    system(""pause"");}

反向迭代器reverse_iterator，从rbegin(=end)到rend（=begin-1)反向遍历，仍然通过++.

解决方案二：

#include<iostream>#include<fstream>#include<string>#include<vector>#include<iterator>using namespace std;void WriteTxt(const char *in_filename const char *out_filename_1 const char *out_filename_2){    ifstream ifs(in_filename);     ofstream out_file_1(out_filename_1);    ofstream out_file_2(out_filename_2);    istream_iterator<string> ibeg(ifs);      istream_iterator<string> iend;     vector<string> text;    copy(ibeg iend back_inserter(text));    vector<string> out_text_1;    vector<string> out_text_2;    vector<string>::iterator it;    for(it = text.begin(); it != text.end(); it++)    {        if(atoi((*it).c_str()) % 2 == 1)            out_text_1.push_back(*it + ""n"");        else            out_text_2.push_back(*it + "" "");    }    ostream_iterator<string> os_1(out_file_1 "");    ostream_iterator<string> os_2(out_file_2 "");    copy(out_text_1.begin() out_text_1.end() os_1);    copy(out_text_2.begin() out_text_2.end() os_2);}int main(){    WriteTxt(""E:\data.txt""E:\out_1.txt""E:\out_2.txt"");    system(""pause"");} 

我的E：data.txt里面有数字
13
22
5
24

解决方案三：
这家伙真的太懒了，字都不码一下