diff --git a/第一讲 变量、输入输出、表达式与顺序语句/612.cpp b/第一讲 变量、输入输出、表达式与顺序语句/612.cpp
new file mode 100644
index 0000000..b744ce6
--- /dev/null
+++ b/第一讲 变量、输入输出、表达式与顺序语句/612.cpp	
@@ -0,0 +1,13 @@
+#include <iostream>
+
+using namespace std;
+
+const double pi = 3.14159;
+
+int main()
+{
+    int R;
+    cin >> R;
+    printf("VOLUME = %.3lf", (4 / 3.0) * pi * R * R * R);
+    return 0;
+}