/*
 * reverse lines of a file
 */
#include <stdio.h>
#include <stdlib.h>

#define N 256
char line[N];
FILE *input;

main(argc,argv)
char **argv;
{
    register i,c;
    input = stdin;
    do {
        if(argc>1) {
            if((input=fopen(argv[1],"r"))==NULL) {
                fprintf(stderr,"rev: cannot open %s\n",
                    argv[1]);
                exit(1);
            }
        }
        for(;;){
            for(i=0;i<N;i++) {
                line[i] = c = getc(input);
                switch(c) {
                case EOF:
                    goto eof;
                default:
                    continue;
                case '\n':
                    break;
                }
                break;
            }
            while(--i>=0)
                putc(line[i],stdout);
            putc('\n',stdout);
        }
eof:
        fclose(input);
        argc--;
        argv++;
    } while(argc>1);
}
