我正在尝试编写将时间设置为11/7/2018的程序，但是它不起作用。它仅显示4个错误。有人可以帮我纠正代码。
def update_data_plot(attrname, old, new):
new_value = dropdown.value
# here make something that you can pass to construct a new ColumnDatasource with the new value
# and put it into a variable called newdata
source.data = ColumnDataSource(data=newdata).data
它在成员函数#include <iostream>
using namespace std;
class date {
private:
int day,month,year;
public:
void advance();
date(){
day=1;
month=1;
year=2018;
};
void setDate(){
cout<<day<<"/"<<month<<"/"<<year<<endl;
}
};
void date::advance(){
for(month=1;month=<12;month++){
for(day=1;day=<31;day++){
cout<<day<<"/"<<month<<"/"<<year<<endl;
}
}
}
int main(){
date d;
cout<<"Date set as:";
d.setDate();
cout<<"Setting the advance method"<<endl;
d.advance();
return 0;
}
中显示：
void date::setDate()答案 0 :(得分：1)
我认为您打算写
cout<<day<<"/"<<month<<"/"<<year<<endl;
代替
cout<<date<<"/"<<month<<"/"<<year<<endl;
在setDate和Advance函数中