标准输入保存到标准输出

#include <unistd.h>
#include <iostream>
using namespace std;

int main()
{
        int     nRead = 0;
        char    szBuf[1024 * 8] = {0};

        while ( (nRead = read(STDIN_FILENO, szBuf, sizeof(szBuf) - 1)) > 0)
        {
                if ( write(STDOUT_FILENO, szBuf, nRead) != nRead)
                {
                        cout << "write error!" << endl;
                }
        }

        if (nRead < 0)
        {
                cout << "read error!" << endl;
        }

        return 0;
}