/*

* Output should be the file contents in uppercase.

* For example:

* $ cat a.txt

* a b c d

* $ ./toupper a.txt

* A B C D

*/

static void transform(const char *buffer, size_t length) return; int main(int argc, const char *argv[]) char buffer[256]; FILE *fp; size_t bytes_read; unsigned int counter = 0; if (argc != 2) { printf("Usage: ./toupper "); exit(EXIT_FAILURE); fp = fopen(argv[1], "r"); if (fp == NULL) { printf("error: could not open %s: %s ", argv[1], strerror(errno)); exit(EXIT_FAILURE); for (;;) { bytes_read = fread(buffer, 1, sizeof(buffer), fp); if (bytes_read == 0) break; transform(buffer, sizeof buffer); printf("%.*s", (int)bytes_read, buffer); return 0