哪位哥哥姐姐能帮帮我吗?
小弟是C的初学者，哪位好心的哥哥姐姐能帮我解决下面两个问题，万分感谢！！！！
1.Write a C program that reads in two integers into two variables using scanf. The program should switch the two integers without using a third variable. The program should output the new values of the integers.
2.Write a C program that reads in three integers using scanf, and prints out the maximum of the three integers.
