傻孩子菜单框架

转载自：http://blog.csdn.net/yangluoning/article/details/9313677

#include <stdio.h>#include <string.h>#define Null 0char over=0; //结束标志//结构体类型定义 struct MenuItem     {  char MenuCount; //结构体数组的元素个数 char *DisplayString;  //当前LCD显示的信息 void (*Subs)();  //执行的函数的指针. struct MenuItem *Childrenms;  //指向子节点的指针 struct MenuItem *Parentms;  //指向父节点的指针 }; //函数声明 void Nop(void); void DoSomething(struct MenuItem *manyou); void GameOver(void); void Locate(struct MenuItem *manyou); void Run(struct MenuItem *manyou);//==================================== //结构体声明 struct MenuItem m0_main[4]; struct MenuItem m1_file[5]; struct MenuItem m1_edit[4]; struct MenuItem m1_view[2]; struct MenuItem m2_font[3]; struct MenuItem m1_help[3];//==================================== //结构体实现 struct MenuItem m0_main[4]= { {4,"file",Nop,m1_file,Null}, {4,"edit",Nop,m1_edit,Null}, {4,"view",Nop,m1_view,Null}, {4,"help",Nop,m1_help,Null}, };struct MenuItem m1_file[5]= { {5,"open",DoSomething,Null,m0_main}, {5,"save",DoSomething,Null,m0_main}, {5,"save as",DoSomething,Null,m0_main}, {5,"print",DoSomething,Null,m0_main}, {5,"exit",GameOver,Null,m0_main}, };struct MenuItem m1_edit[4]= { {4,"undo",DoSomething,Null,m0_main}, {4,"redo",DoSomething,Null,m0_main}, {4,"copy",DoSomething,Null,m0_main}, {4,"paste",DoSomething,Null,m0_main}, };struct MenuItem m1_view[2]= { {2,"font",Nop,m2_font,m0_main}, {2,"color",DoSomething,Null,m0_main}, };struct MenuItem m2_font[3]= { {3,"songti",DoSomething,Null,m1_view}, {3,"heiti",DoSomething,Null,m1_view}, {3,"youyuan",DoSomething,Null,m1_view}, };struct MenuItem m1_help[3]= { {3,"index",DoSomething,Null,m0_main}, {3,"online",DoSomething,Null,m0_main}, {3,"about",DoSomething,Null,m0_main}, };//==================================== //函数实现 void Locate(struct MenuItem *manyou) { printf("Now we at %s\n" ,manyou->DisplayString); }void Run(struct MenuItem *manyou) { (*(manyou->Subs))(manyou); }void Nop(void) {}void DoSomething(struct MenuItem *manyou) { printf("we have done %s\n" ,manyou->DisplayString); }void GameOver(void) { over=1; printf("Now Game is Over "); getchar(); }//==================================== //主函数 int main(int argc, char *argv[]) { char charin; //输入的字符 char menuid[3]={0,0,0}; //某一级的菜单的偏移量的记录数组 char i=0; //上面数组的下标值struct MenuItem *manyou; //漫游,在菜单中漫游manyou=&m0_main[0]; //开始的位置 Locate(manyou); //输出while (!over) //如果还没完 { charin=getchar(); //读取键盘字符 switch (charin) //根据字符跳转 { case '0': //到同级菜单的后一项 { menuid[i]++; if (menuid[i]>manyou->MenuCount-1) menuid[i]=0;//可以看到MenuCount项是必要的 Locate(manyou+menuid[i]); break; } case '1': //到同级菜单的前一项 { if (menuid[i]==0) menuid[i]=manyou->MenuCount-1;//可以看到MenuCount项是必要的 else menuid[i]--; Locate(manyou+menuid[i]); break; } case '+': //到下一级菜单,无下级时执行某功能 { if ((manyou+menuid[i])->Childrenms !=Null) { manyou=(manyou+menuid[i])->Childrenms; i++; menuid[i]=0; Locate(manyou+menuid[i]); } else { Run(manyou+menuid[i]); } break; } case '-': //到上一级菜单,无上级时给出些提示 { if ((manyou+menuid[i])->Parentms !=Null) { manyou=(manyou+menuid[i])->Parentms; i--; Locate(manyou+menuid[i]); } else { printf("You are at the top of menu"); } break; } default:  break; } } return 0; }