#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
const int BUF_SIZE = 256;
 
int main(void) {
  int buffer0[BUF_SIZE];
  int buffer1[BUF_SIZE];
  FILE *fp0 = fopen("5-1.txt", "r");
  FILE *fp1 = fopen("5-2.txt", "r");
  int* p;
 
  while((fgets(buffer0, BUF_SIZE, fp0)) && fgets(buffer1, BUF_SIZE, fp1)) {
    if (strcmp(buffer0, buffer1) == 0) {
      p = strchr(buffer0, '\n');
      *p = 0;
      puts(buffer0);
    } else {
      puts("*");
    }
  }
 
  return EXIT_SUCCESS;
}
 

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