新建一个结构体，需要什么按键，加入对应内容。typedef struct{ unsigned char current; unsigned char up; unsigned char down; unsigned char enter; ussigned char back; void (*current_operation)();} key_table;
定义。菜单的按键连接。key_table const table[7]={ {0,1,1,1,1,(*fun0)}, {1,(*fun1)}, {2,(*fun2)}, {3,(*fun3)}, {4,(*fun4)}, {5,(*fun5)}, {6,(*fun6)}, };
定义变量INT8U func_index=0;void (*current_operation_index)();
主菜单中的while(1){ key_temp=keyscan(key()); switch(key_temp) { case 10:func_index=table[func_index].enter;break; case 11:showtime();func_index=table[func_index].back;break; default:func_index=table[func_index].current;break; } current_operation_index=table[func_index].current_operation;(*current_operation_index)();}
注意：在CVAVR或某些编译器中：不需要星号。如下。key_table const table[7]={ {0,1,1,1,6,(fun0)}, {1,1,2,2,0,(fun1)}, {2,1,3,3,1,(fun2)}, {3,1,4,4,2,(fun3)}, {4,1,5,5,3,(fun4)}, {5,1,6,6,4,(fun5)}, {6,1,0,0,5,(fun6)}, };