/* link this with sortfile from 1.c */


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

int main()
{
    char inname[80], outname[80], *p;
    FILE *infp, *outfp;
    extern void sortfile(FILE *in, FILE *out);

    printf("Input file: ");
    fgets(inname, sizeof inname, stdin);
    if ((p = strchr(inname, '\n')) != NULL)
	*p = '\0';
    if ((infp = fopen(inname, "r")) == NULL) {
	perror(inname);
	return 1;
    }

    printf("Output file: ");
    fgets(outname, sizeof outname, stdin);
    if ((p = strchr(outname, '\n')) != NULL)
	*p = '\0';
    if ((outfp = fopen(outname, "w")) == NULL) {
	perror(outname);
	return 1;
    }

    sortfile(infp, outfp);

    return 0;
}