Finished 1.19 but it can be done in-place.

1 files changed, 7 insertions, 5 deletions

diff --git a/reverse.c b/reverse.c
index 0681560..98edd98 100644
--- a/reverse.c
+++ b/reverse.c
@@ -5,7 +5,7 @@
 // Prototypes
 int get_line(char line[], int maxlength);
 void line_copy(char to[], char from[]);
-void reverse_copy(char to[], char from[]);
+void reverse_copy(char to[], char from[], int length);
 
 /*
  * MAIN
@@ -17,7 +17,7 @@ int main() {
     char reversed_line[MAXLENGTH]; // current reversed line
 
     while ((len = get_line(line, MAXLENGTH)) > 0) {
-        reverse_copy(line, reversed_line, len);
+        reverse_copy(reversed_line, line, len);
         printf("%s\n", reversed_line);
     }
     return 0;
@@ -61,8 +61,10 @@ void line_copy(char to[], char from[]) {
 void reverse_copy(char to[], char from[], int length) {
     int i;
 
-    i = 0;
-    while ((to[i] = from[i]) != '\0')
-        ++i;
+    for (i = 0; i < length; ++i) {
+        to[length - 1 - i] = from[i];
+    }
+
+    to[length] = '\0';
 }