我收到以下代码的错误消息:
class Money {
public:
Money(float amount, int moneyType);
string asString(bool shortVersion=true);
private:
float amount;
int moneyType;
};
首先,我认为默认参数不允许作为C ++中的第一个参数,但允许使用。
答案 0 :(得分:170)
您可能正在重新定义函数实现中的默认参数。它只应在函数声明中定义。
//bad (this won't compile)
string Money::asString(bool shortVersion=true){
}
//good (The default parameter is commented out, but you can remove it totally)
string Money::asString(bool shortVersion /*=true*/){
}
//also fine, but maybe less clear as the commented out default parameter is removed
string Money::asString(bool shortVersion){
}