Great C programming funHEADmaster

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1 files changed, 39 insertions, 0 deletions

diff --git a/18_reverse_str/reverse.c b/18_reverse_str/reverse.c
new file mode 100644
index 0000000..bea6e4e
--- /dev/null
+++ b/18_reverse_str/reverse.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void reverse(char * str) {
+  if (!str) {
+    return;
+  }
+  size_t string_length = 0;
+  char temp;
+  const char * ptr = str;
+  // Find string length
+  while (*ptr != '\0') {
+    string_length++;
+    ptr++;
+  }
+
+  for (size_t i = 0; i < (string_length/2); i++) {
+    temp = str[i];
+    str[i] = str[string_length-1-i];
+    str[string_length-1-i] = temp;
+  }
+}
+
+int main(void) {
+  char str0[] = "";
+  char str1[] = "123";
+  char str2[] = "abcd";
+  char str3[] = "Captain's log, Stardate 42523.7";
+  char str4[] = "Hello, my name is Inigo Montoya.";
+  char str5[] = "You can be my wingman anyday!";
+  char str6[] = "Executor Selendis! Unleash the full power of your forces! There may be no tomorrow!";
+  char * array[] = {str0, str1, str2, str3, str4, str5, str6};
+  for (int i = 0; i < 7; i++) {
+    reverse(array[i]);
+    printf("%s\n", array[i]);
+  }
+  return EXIT_SUCCESS;
+}