C语言程序设计教程（第三版）课后习题1.5 （C语言代码）

解题思路:

注意事项:

参考代码:#include<stdio.h>
                int main()
                {
                     printf("**************************\n");
                     printf("Hello World!\n");
                     printf("**************************\n");
                     return 0;
                }