1 files changed, 50 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/OR_USING_C/02.3.c b/reference/C/CONTRIB/OR_USING_C/02.3.c
new file mode 100644
index 0000000..e669d00
--- /dev/null
+++ b/reference/C/CONTRIB/OR_USING_C/02.3.c
@@ -0,0 +1,50 @@
+#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);
+}
+