怎么用C语言写万年历,输出一个月份,显示下个月和上个月的日历情况...答:这是我原来的代码,可运行,你看着改吧,C++写的。include"iostream"include"iomanip"include"windows.h"using namespace std;int tab[2][13]={ {0,31,28,31,30,31,30,31,31,30,31,30,31},{0,31,29,31,30,31,30,31,31,30,31,30,31} };int y,m,d,leap;class Calendar { publi...