operation.h

算术表达式求值,数据结构课程设计,非常实用,适合学生

double Operation(double x1,double x2,char sign)
{
	if(sign=='+')
	{
		return x1+x2;
	}
	else if(sign=='-')
	{
		return x1-x2;
	}
	else if(sign=='*')
	{
		return x1*x2;
	}
	else if(sign=='/')
	{
		return x1/x2;
	}
	else if(sign=='^')
	{
		return pow(x1,x2);
	}
	else 
	{
		cout<<"符号错误!"<<endl;
		return -9999999999999999;
	}
}