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

int main ( int argc, char * argv[] )
{
	FILE *fda, *fdb, *fdout;
	char *res1, *res2;
	char bufa[200];
	char bufb[200];
	char *p1, *p2;

	if ( argc != 4 ) {
		printf("usare %s file1 file2 outfile\n",argv[0]);
		return 1;
	}
        
	fda = fopen (argv[1], "r");
	if ( fda == NULL) {
		perror("Errore in apertura del file");
                exit(1);
	}
	fdb = fopen (argv[2], "r");
	if ( fdb == NULL) {
		perror("Errore in apertura del file");
                exit(1);
	}

	fdout = fopen (argv[3], "a");
	while (1)
	{       
		res1=fgets(bufa, 200, fda);
		if( res1==NULL )
      		break;
      		if ((p1 = strchr (bufa, '\n')) != NULL)
  		  *p1 = '\0';
      		
      		res2=fgets(bufb, 200, fdb);
		if( res2==NULL )
      		break;
      		if ((p2 = strchr (bufb, '\n')) != NULL)
  		  *p2 = '\0';
        	fprintf( fdout ,"%s %s\n", res1, res2);
	}

	fclose ( fda);
	fclose ( fdb);
	fclose ( fdout);
	return 0;
}