diff options
Diffstat (limited to 'reference/C/CONTRIB/OR_USING_C/02.2.c')
-rw-r--r-- | reference/C/CONTRIB/OR_USING_C/02.2.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/02.2.c b/reference/C/CONTRIB/OR_USING_C/02.2.c new file mode 100644 index 0000000..7ea5ffd --- /dev/null +++ b/reference/C/CONTRIB/OR_USING_C/02.2.c @@ -0,0 +1,44 @@ +#include <stdio.h> + +main(argc, argv) +int argc; +char **argv; +{ + FILE *from, *to; + char line[BUFSIZ]; + /* + * Check our arguments. + */ + if (argc != 3) { + fprintf(stderr, "Usage: %s from-file to-file\n", *argv); + exit(1); + } + /* + * Open the from-file for reading. + */ + if ((from = fopen(argv[1], "r")) == NULL) { + perror(argv[1]); + exit(1); + } + /* + * Open the to-file for appending. If to-file does + * not exist, fopen will create it. + */ + if ((to = fopen(argv[2], "a")) == NULL) { + perror(argv[2]); + exit(1); + } + /* + * Now read a line at a time from the from-file, + * and write it to the to-file. + */ + while (fgets(line, BUFSIZ, from) != NULL) + fputs(line, to); + /* + * Now close the files. + */ + fclose(from); + fclose(to); + exit(0); +} + |