如何输出有符号变量
问题描述：
如何打印变量的有符号值?例如:
How do I print signed value of my variable? For example:
int main()
{
int variable_name = 2;
cout<<variable_name<<endl;
}
我希望这段代码打印 +2，而不仅仅是 2.而且我不想使用这样的结构:
I want this code to print +2, not just 2. And I don't want to use such construction:
cout<<"+"<<variable_name<<endl;