Add the initial EN translation for C++ code (#1346)

en/codes/cpp/chapter_greedy/max_capacity.cpp

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+/**
+ * File: max_capacity.cpp
+ * Created Time: 2023-07-21
+ * Author: krahets (krahets@163.com)
+ */
+
+#include "../utils/common.hpp"
+
+/* Maximum capacity: Greedy */
+int maxCapacity(vector<int> &ht) {
+    // Initialize i, j, making them split the array at both ends
+    int i = 0, j = ht.size() - 1;
+    // Initial maximum capacity is 0
+    int res = 0;
+    // Loop for greedy selection until the two boards meet
+    while (i < j) {
+        // Update maximum capacity
+        int cap = min(ht[i], ht[j]) * (j - i);
+        res = max(res, cap);
+        // Move the shorter board inward
+        if (ht[i] < ht[j]) {
+            i++;
+        } else {
+            j--;
+        }
+    }
+    return res;
+}
+
+/* Driver Code */
+int main() {
+    vector<int> ht = {3, 8, 5, 2, 7, 7, 3, 4};
+
+    // Greedy algorithm
+    int res = maxCapacity(ht);
+    cout << "The maximum capacity is " << res << endl;
+
+    return 0;
+}