1 files changed, 51 insertions, 0 deletions
diff --git a/structures/task25.cpp b/structures/task25.cpp
new file mode 100644
index 0000000..fde664c
--- /dev/null
+++ b/structures/task25.cpp
@@ -0,0 +1,51 @@
+#include <iostream>
+#include "stack.h"
+
+using namespace std;
+
+int main()
+{
+    int n;
+    cout << "n = ";
+    cin >> n;
+
+    stack *s = NULL;
+    char* buf = new char[32];
+    for (int i = 0; i < n; i++)
+    {
+        cin >> buf;
+        if ('0' <= buf[0] && buf[0] <= '9')
+        {
+            int i = atoi(buf);
+            push(s, i);
+        }
+        else 
+        {
+            switch (buf[0])
+            {
+                case '+': {
+                    int o1 = pop(s);
+                    int o2 = pop(s);
+                    push(s, o2 + o1);
+                } break;
+                        
+                case '-': {
+                    int o1 = pop(s);
+                    int o2 = pop(s);
+                    push(s, o2 - o1);
+                } break;
+
+                case '*': {
+                    int o1 = pop(s);
+                    int o2 = pop(s);
+                    push(s, o2 * o1);
+                } break;
+            }
+        }
+    }
+
+    int result = pop(s);
+    cout << "Result = " << result << endl;
+
+    return 0;
+}