对文件进行筛选c语言,C语言文件读写数据筛选源代码

C语言 文件读写 数据筛选 源代码

#include

#include

#include

#include

using namespace std;

int p_2, p_3;

//Author:snowman QQ:254934905

void find_p(char* str) //找|

{

int i, num;

num &＃61; 0;

for(i &＃61; 0; str[i]; i &＃43;&＃43;)

{

if(str[i] &＃61;&＃61; &＃39;|&＃39;)

{

num &＃43;&＃43;;

if(num &＃61;&＃61; 2) p_2 &＃61; i;

if(num &＃61;&＃61; 3) { p_3 &＃61; i; break; }

}

}

}

int str_int(string str)//转化为数字

{

int gd &＃61; 0, i &＃61; 0;

while(str[i] <&＃39;0&＃39; || str[i] > &＃39;9&＃39;) i &＃43;&＃43;;

gd &＃61; str[i] - &＃39;0&＃39;;

for(i &＃61; i&＃43;1; str[i]>&＃61;&＃39;0&＃39; && str[i] <&＃61; &＃39;9&＃39;; i &＃43;&＃43;)

gd &＃61; gd*10&＃43; str[i] - &＃39;0&＃39;;

return gd;

}

int main()

{

typedef map M;

map::iterator it;

M m;

char f_name[100], line[400], ch[200]&＃61;"处理后";

int grade;

string str, str_p, str_s;

FILE *ftp, *ftp1;

f_name[0] &＃61; 0;

bool flag &＃61; true;

cout <

cout <

cout <

cout <

cout <

while(flag)

{

scanf("%s",f_name);

/

ftp &＃61; fopen(f_name, "r"); //打开文件流 当前目录下的答案文本

if(ftp &＃61;&＃61; NULL) { cout <

else

flag &＃61; false;

}

while(fgets(line,400,ftp) !&＃61; NULL)

{

str &＃61; line;

find_p(line);

str_p &＃61; str.substr(0, p_2&＃43;1);

if(p_3-p_2-1 <&＃61; 0) str_s[0] &＃61; 0;

else

str_s &＃61; str.substr(p_2&＃43;1, p_3-p_2-1);

grade &＃61; str_int(str_s);

it &＃61; m.find(str_p);

if(it !&＃61; m.end()) // 已经存在

{

if(grade > it->second) it->second &＃61; grade;

}

else

m.insert(map::value_type(str_p, grade));

}

fclose(ftp); //关闭文件

strcat(ch, f_name);

cout <

cout <

ftp1 &＃61; freopen(ch,"w",stdout); //写入文件

for(it&＃61;m.begin(); it !&＃61; m.end(); it &＃43;&＃43;)