#include
void main()
{
double a, b,result;
char type;
cout<<"请输入要预算的两数及运算类型";
cin<cin<cin<
result=a+b;
else if(type=="-")
result=a-b;
else if(type=="*")
result=a*b;
else if(type=="/")
result=a/b;
else cout<<"Data Error.";
cout<<"The result is:";
cout<