二进制表达式的操作数无效（＆＃39; std :: ostream＆＃39;（又名＆＃39; basic_ostream <char>＆＃39;）和＆＃39; const char *＆＃39;）

Question

当尝试使用Cheerp（使用clang ++）编译我的c ++代码时，我从终端获得此输出：

example.cpp:102:9: error: invalid operands to binary expression ('std::ostream'
      (aka 'basic_ostream<char>') and 'const char *')
    out << "(" << loc.x << ", " << loc.y << ")";
    ~~~ ^  ~~~

这是我对终端的命令：

/opt/cheerp/bin/clang++ -target cheerp example.cpp -o example.js

以下是它遇到问题的代码：

static std::ostream& operator <<(std::ostream & out, const CornerLoc &loc)
{
    out << "(" << loc.x << ", " << loc.y << ")";
    if (loc.type == kCorner)
        out<<"-corner";
    if (loc.type == kCornerNorthWest)
        out<<"-cornerNW";
    if (loc.type == kCornerNorthEast)
        out<<"-cornerNE";
    if (loc.type == kCornerSouthWest)
        out<<"-cornerSW";
    if (loc.type == kCornerSouthEast)
        out<<"-cornerSE";
    return out;
}

Answer 1

FIXED ::我忘了#include <iostream>