utput()原帖由 heritaa 于 2009-2-25 03:04 PM 发表
题目：一定做在function outside the class。
write a program to accept operator(+,-,*,/) from the user,perform the calaulation by accepting another two number from the keyboard and display its sum.
for example,if the operator accepted is "+",key in two numbers ,perform the addition opearation and display its sum.
For any other value,display the text "Invalid Input".
我做到这里。。答案错了。。
# include<iostream.h>
class number
{
public:float x,y,c;
char opt;
void input();
void output();
};
void number::input()
{
cout<<"\nEnter the first number :";
cin>>x;
cout<<"\nEnter the second nunber :";
cin>>y;
cout<<"\nEnter the operator(+,-,*,/)";
cin>>opt;
}
{
void number:: output()
{
switch(opt);
case (opt="+")
z=x+y;
cout<<"\nBreak";
case (opt="-")
z=x-y;
cout<<"\nBreak"
case (opt="*")
z=x*y;
cout<<"\nBreak";
case (opt="/")
z=x/y;
cout<<"\nBreak";
else
"!Wrong Entry"
}
void number::display()
{
cout<<"\nThe first number is :";
cout<<"\nThe second number is :"
}
void main()
number obj;
cout<<"\nThe result is :";
obj.input();
cout<<"\nThe result :";
obj.output();
obj.opt();
}
