显示指定文件中出现在另一个文件中的所有句子

#include <stdio.h> 
#include <string.h>  
#include <stdlib.h>

#define STRLEN 1024

int main(int argc,char *argv[]){
    
    if(argc != 2){//命令行参数错误
        fprintf(stderr,"command error\n");
        exit(-1);
    }

    FILE * searchfor;
    searchfor = fopen(argv[1], "r");

    if( searchfor == NULL){
        fprintf(stderr,"Error: Unable to open word list\n");
        exit(-1);
    }

    char lineFrom[STRLEN + 1];

    while(fgets(lineFrom, STRLEN, stdin) != NULL){

        if(lineFrom[strlen(lineFrom) - 1] == '\n'){
            lineFrom[strlen(lineFrom) - 1] = 0;
        }

        char linesearch[STRLEN + 1];
        rewind(searchfor);

        while(fgets(linesearch, STRLEN, searchfor) != NULL){

            if(linesearch[strlen(linesearch) - 1] == '\n'){
                linesearch[strlen(linesearch) - 1] = 0;
            }

            if(strlen(linesearch) != 0 && strstr(lineFrom,linesearch) != NULL){
                printf("%s\n", lineFrom);
                break;
            }

        }
    }

    fclose(searchfor);
    
    return 0;
}