//判断文件类型为pdf或者word类型 #include
     
      #include
      
       int File(char *Filename);int main(int argc, char *argv[]){		  char Filename[40];	  memset(Filename,0x00,sizeof(Filename));	  strcpy(Filename,argv[1]);	  printf("%s",Filename);	  // NULL => not file type	  printf("12------%d",File(Filename));	  	  if(File(Filename) == 1 ){	  	printf("The file is  type of word or pdf");	  	}	  else{	  		printf("The file is not  type of word or pdf");	  	}}int File(char *Filename){	   int flag = 0; // 0->NOT 1->yes	   char str[6];	   memset(str,0x00,sizeof(str));	  //.doc .docx .pdf 	  if( strncmp(Filename,".doc",4) == 0 || strncmp(Filename,".docx",5) == 0 || strncmp(Filename,".pdf",4) == 0)	  	{	  		 printf("line of 31————%s",Filename);	  		 flag = 0;	  		 return flag;	  	}	  strncpy(str,Filename+(strlen(Filename))-4,4);	  printf("line of 33————%s",str);	  if( strncmp(str,".doc",4) == 0 ||strncmp(str,".pdf",4)== 0 )	  	{	  		flag = 1;	  		}	  	   memset(str,0x00,sizeof(str));	   printf("line of 40————%s",str);	   strncpy(str,Filename+(strlen(Filename))-5,5);	   if( strncmp(str,".docx",5) == 0  )	  	{	  		flag = 1;	  	}      return flag;}