1 files changed, 37 insertions, 0 deletions
diff --git a/algorithms/string_reverse.cc b/algorithms/string_reverse.cc
new file mode 100644
index 0000000..8b3e12c
--- /dev/null
+++ b/algorithms/string_reverse.cc
@@ -0,0 +1,37 @@
+#include <iostream>
+#include <string>
+
+using namespace std;
+
+
+string rev(string &s)
+{
+  string res;
+  for (int i = s.size()-1; i >= 0; i--) { // unsigned not!
+    res += s[i];
+  }
+  return res;
+}
+
+void rev_inplace(string &s)
+{
+  char temp;
+  int j = s.size()-1;
+  for (int i = 0; i < j; i++, j--) {
+    temp = s[i];
+    s[i] = s[j];
+    s[j] = temp;
+  }
+}
+
+
+int main()
+{
+  string s = "Asdf";
+  cout << rev(s) << endl << "---" << endl;
+  cout << s << endl;
+  rev_inplace(s);
+  cout << s << endl;
+  return 0;
+}
+