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Visual c++ '；操作员<<'；必须返回值吗？

visual-c++ compiler-errors

Visual c++ '；操作员<<'；必须返回值吗？,visual-c++,compiler-errors,Visual C++,Compiler Errors,获取编译器错误c4716（'operator代码中没有任何值的return。正如错误所述，您的operator//Friend函数用于将塔打印到流 奥斯特雷姆算子 // Friend function to print the towers to stream ostream& operator<<(ostream& stream, const TheGame& game) { stream << "Tower #0:"

获取编译器错误c4716（'operator代码中没有任何值的
return
。正如错误所述，您的
operator
//Friend函数用于将塔打印到流
奥斯特雷姆算子

// Friend function to print the towers to stream
ostream& operator<<(ostream& stream, const TheGame& game) {
stream
    << "Tower #0:" << game.towers[0] << endl
    << "Tower #1:" << game.towers[1] << endl
    << "Tower #2:" << game.towers[2] << endl
    ;
}



// Friend function to print the towers to stream
ostream& operator<<(ostream& stream, const TheGame& game) {
    return stream
        << "Tower #0:" << game.towers[0] << endl
        << "Tower #1:" << game.towers[1] << endl
        << "Tower #2:" << game.towers[2] << endl
        ;
}