技巧：巧用数组减少if语句

/* * FileName: odd_or_even.cpp * Author: Antigloss at http://stdcpp.cn * LastModifiedDate: 2005-7-22 22:30 * Purpose: Tell if a given number is odd or even */ #include cstdlib // for EXIT_SUCCESS #include iostream #include limits // for nu

 /*
 * FileName:          odd_or_even.cpp
 * Author:            Antigloss at http://stdcpp.cn
 * LastModifiedDate:  2005-7-22 22:30
 * Purpose:           Tell if a given number is odd or even
 */

#include     // for EXIT_SUCCESS
#include
#include      // for numeric_limits

// flush the input buffer
inline void flush_stdin()
{
    std::cin.clear(); // clear error state of the stream
    // clear data left at the input buffer
    std::cin.ignore( std::numeric_limits::max(), '\n' );
} // end of flush_stdin

int main()
{
    long num;
    const char *msg[] = { "Even", "Odd" };

    for (;;) {
        std::cout

        if ( std::cin >> num ) {
            std::cout         } else {
            std::cin.clear(); // clear error state before reading from the input stream
            if ( std::cin.get() == 'q' ) {
                flush_stdin();
                break;
            }
            std::cerr         }
        flush_stdin();
    }

    std::cout     std::cin.get();
    return EXIT_SUCCESS;
}