@echo off
setlocal enabledelayedexpansion
for /f "tokens=1,2,3 delims= " %%c in (B.txt) do (
    findstr /c:"%%h" A.txt>nul&&echo %%c	%%d	%%e
   ))>C.txt
endlocal
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@echo off
pushd "%~dp0"
set "fileA=A.txt"
set "fileB=B.txt"
set "fileC=C.txt"
findstr /elg:"%fileA%" "%fileB%">"%fileC%"
popd
pause
exit /b
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@echo off
REM 在fileB中查找行which-第三列包含于fileA中-保存到fileC
if not "%~1"=="" goto print
pushd "%~dp0"
set fileA="A.txt"
set fileB="B.txt"
set fileC="C.txt"
setlocal EnableDelayedExpansion
for /f "usebackq tokens=1 delims=" %%A in (%fileB%) do (
  set /a "n+=1"
  set "#!n!=%%A"
)
>%fileC% (
  for /f "tokens=1 delims=:" %%A in ('"%0 %fileB%|findstr /nlxg:%fileA%"') do (
    echo !#%%A!
  )
)
endlocal
popd
pause
exit /b

:print
for /f "usebackq tokens=3" %%a in ("%~1") do (
  echo %%a
)
exit /b
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@echo off
set "pattern="
for /f "delims=" %%i in (A.txt) do call set "pattern=%%pattern%%.*%%i$ "
type "B.txt" | findstr "%pattern%" > "C.txt"
pause
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAX 2048
void ch(char *);
int star(char *b,FILE *a);
int main(int argc,char *argv[3])
{
	/*设置路径 
	char *Path_a="C:\\Users\\Cool_Breeze\\Desktop\\gin\\test\\a.txt";
	char *Path_b="C:\\Users\\Cool_Breeze\\Desktop\\gin\\test\\b.txt";
	char *Path_c="C:\\Users\\Cool_Breeze\\Desktop\\gin\\test\\c.txt";
	*/
	//打开文件 
	FILE *fp_a,*fp_b,*fp_c;
	char a[MAX],b[MAX],c[MAX];
	if ((fp_a=fopen(*(argv+1),"r"))==NULL)
	{
		printf("%s 打开失败！",*(argv+1));
		return 0;
	}
	if ((fp_b=fopen(*(argv+2),"r"))==NULL)
	{
		printf("%s 打开失败！",*(argv+2));
		return 0;
	}
	if ((fp_c=fopen(*(argv+3),"w"))==NULL)
	{
		printf("%s 打开失败！",*(argv+3));
		return 0;
	} 
	while(fgets(b,MAX,fp_b)!=NULL)
	{
		if (star(b,fp_a)==1)                //写入 
		{
			fprintf(fp_c,"%s",b);
		} 
	}
	fclose(fp_a);
	fclose(fp_b);
	fclose(fp_c);
	return 0;
}
int star(char *b,FILE *a)
{
	char b_s[MAX];                            //储存第三列字符串 
	char *c=b_s;
	int d=0,n=0;
	while (*(b+n++) != '\0')
	{
		 if (*(b+n) == ' ')
		 {
			d++;
			if (d==2)                         //出现第二个分隔符后拷贝第三列字符串 
			{
				strncpy(c,b+n+1,MAX);         //拷贝 
				ch(c);
				goto A;
			}
		 }
		 
	}
	A:                                         
	char temp[MAX]="0";
	fseek(a,0,SEEK_SET);                      //恢复文件指针 
	while(fgets(temp,MAX,a)!=NULL)
	{
		ch(temp);
		if (strncmp(temp,c,MAX)==0)           //比较字符串
		{
			return 1;                         //一样返回1 
		}
	}	
	return 0;                                 //不一样返回0 
}
void ch(char *old)
{
	char sta;
	do
	{
		sta=*(old++);
		if (sta == '\n' || sta == '\r')
		{
			old[strlen(old)-1]='\0';          //去掉换行符 
		}
	}while(sta);
}
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gawk "NR==FNR{a[$1]=$1}NR>FNR{if($3 in a)print}" "A.txt" "B.txt" > "C.txt"
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