1 #include <iostream>
 2 using namespace std;
 3
 4 void compare_until_nonspace(int &c_std, int &c_usr, FILE *&fd_std, FILE *&fd_usr, int &ret)
 5 {
 6     while((isspace(c_std)) || (isspace(c_usr)))
 7     {
 8         if (c_std != c_usr)
 9         {
10             if (c_std == '\r' && c_usr == '\n')
11             {
12                 c_std = fgetc(fd_std);
13                 if (c_std != c_usr)
14                     ret = 3; //PRESENTATION ERROR
15             }
16             else
17             {
18                 ret = 3; //PRESENTATION ERROR
19             }
20         }
21         if (isspace(c_std))
22             c_std = fgetc(fd_std);
23         if (isspace(c_usr))
24             c_usr = fgetc(fd_usr);
25     }
26 }
27
28 int tt_compare_output(string &file_std, string &file_usr)
29 {
30     int ret = 1; //ACCEPTED
31     int c_std, c_usr;
32     FILE *fd_std = fopen(file_std.c_str(), "r");
33     FILE *fd_usr = fopen(file_usr.c_str(), "r");
34
35     if (fd_std == NULL)
36     {
37         printf("%s open standard file failed %s\n", strerror(errno), file_std.c_str());
38     }
39
40     if (!fd_std || !fd_usr)
41     {
42         ret = -1; //RUNTIME ERROR (ABORTION)
43     }
44     else
45     {
46         c_std = fgetc(fd_std);
47         c_usr = fgetc(fd_usr);
48         for(;;)
49         {
50             compare_until_nonspace(c_std, c_usr, fd_std, fd_usr, ret);
51             while(!isspace(c_std) && !isspace(c_usr))
52             {
53                 //    LOG_DEBUG("std: %c usr: %c", c_std, c_usr);
54                 if (c_std == EOF && c_usr == EOF)
55                     goto end;
56                 if (c_std != c_usr)
57                 {
58                     ret = 2; //WRONG ANSWER
59                     goto end;
60                 }
61                 c_std = fgetc(fd_std);
62                 c_usr = fgetc(fd_usr);
63             }
64         }
65     }
66 end:
67     if (fd_std)
68         fclose(fd_std);
69     if (fd_usr)
70         fclose(fd_usr);
71     return ret;
72 }
73
74 int main() {
75     string file_std = "std.txt";
76     string file_usr = "usr.txt";
77     int res = tt_compare_output(*&file_std, *&file_usr);
78     switch(res) {
79         case -1: cout << "RUNTIME ERROR (ABORTION)" << endl; break;
80         case 1: cout << "ACCEPTED" << endl; break;
81         case 2: cout << "WRONG ANSWER" << endl; break;
82         case 3: cout << "PRESENTATION ERROR" << endl; break;
83         default: cout << "SYSTEM ERROR" << endl;
84     }
85     return 0;
86 }

void remove_blank(string file) {//删除文末空行和行末空格fstream target_file(file.c_str(), fstream::in | fstream::out);string line; //作为读取的一行string temp; //用作缓存vector<string> obj; //用于储存整理完成后的每一行if(!target_file) {cout << "Can't open target file!" << endl; //上线后改成LOG_DEBUG
    }while(getline(target_file, line)) {unsigned long len = line.length();int count = 0;for(unsigned long i=len-1; i>=0; i--) {int temp_char = line[i]; //用于将字符转换为ASCII码，保存ASCII码使用if(isspace(temp_char))count++;else break;}temp = line.substr(0, len-count);obj.push_back(temp);}int count_lines = 0; //文末空行的数量for(unsigned long i=obj.size()-1; i>=0; i--) {//去除文末空行if(obj[i].empty())count_lines++;else break;}cout << "count_lines: " << count_lines << endl;for(int i=0; i<count_lines; i++)obj.pop_back();//使用ofstream打开再关闭文件是为了清空源文件
    ofstream empty_file(file.c_str());empty_file.close();//重新打开文本文件fstream target(file.c_str(), fstream::out | fstream::in);if(!target) {cerr << "Can't open file" << endl; //上线后改成LOG_DEBUG
    }//写回源文件for(unsigned long i=0; i<obj.size(); i++)target << obj[i] << endl;target.close();
}