//2.编程序，从键盘输入正整数n，求出n与其反序数之和并输出。例如，输入2038，输出应为 2038+8302=10340。-//2. A program, a positive integer from the keyboard input n, calculate the number of n and its reverse order and output. For example, input 2038, output should be 2038+8302 = 10340.