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#include <stdio.h>
main(argc, argv)
int argc;
char **argv;
{
int n;
FILE *from, *to;
char buf[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);
}
/*
* Note that we only write the number of characters fread
* read in, rather than always writing BUFSIZ characters.
*/
while ((n = fread(buf, sizeof(char), BUFSIZ, from)) > 0)
fwrite(buf, sizeof(char), n, to);
/*
* Now close the files.
*/
fclose(from);
fclose(to);
exit(0);
}
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