pr06018.cpp

来自「c++编程宝典源码及Quincy99编译器 是《标准C++编程宝典》电子工业出」· C++ 代码 · 共 69 行

////////////////////////////////////////
// File Name: pr06018.cpp
////////////////////////////////////////
#include <iostream>

// A menu structure.
struct Menu
{
    char* name;
    void (*fn)();
};

// Menu selection function prototypes.
void FileFunc();
void EditFunc();
void ViewFunc();
void ExitFunc();

// The menu.
Menu menu[] = {
    { "File", FileFunc },
    { "Edit", EditFunc },
    { "View", ViewFunc },
    { "Exit", ExitFunc }
};

const int Selections = sizeof menu / sizeof(Menu);

////////////////////////////////////////
// The main() function.
////////////////////////////////////////
main()
{
    unsigned i, sel = 0;

    while (sel != Selections)
    {
        for (i = 0; i < Selections; i++)
            std::cout << i+1 << ": " << menu[i].name 
                      << std::endl;

        std::cout << "Select: ";
        std::cin >> sel;
        if (sel < Selections+1)
            (*menu[sel-1].fn)();
    }
}

void FileFunc()
{
    std::cout << "File Function" << std::endl;
}

void EditFunc()
{
    std::cout << "Edit Function" << std::endl;
}

void ViewFunc()
{
    std::cout << "View Function" << std::endl;
}

void ExitFunc()
{
    std::cout << "Exit Function" << std::endl;
}