Help!

gcn_zelda · 03-14-2003

can somebody help me with this program?

#include <iostream.h>
#include <windows.h>

int main()
{
cout << "Stephen's C++ Calculator" << endl;
cout << "Enter a number" << endl;
int a;
cin << a;
cout << a << endl;
cout << "Now push a math sign" << endl;
int sign;
cin << sign;
cout << a <<""<< sign << endl;
cout << "Now push a second number" << endl;
int b;
cin << b;
if (sign == " + ");
{
int resultplus;
a + b = resultplus;
cout << resultplus << " is your answer!" << endl;
}
if(sign == " - ");
{
int resultminus;
a - b = resultminus;
cout << resultminus << " is your answer!" << endl;
}
if(sign == "/");
{
int resultdivide;
a / b = resultdivide;
cout << resultdivide << " is your answer!" << endl;
}
if(sign == "*");
{
int resultmultiply;
a * b = resultmultiply;
cout << resultmultiply << " is your answer!" << endl;
}
return 0;
}

**RoD** · 03-14-2003

>>can somebody help me with this program?

Sure! But first format your code using code tags, and tell us the problem!

ThisNukes4u · 03-14-2003

Your "if" statements have semicolons at the end.

**gcn_zelda** · 03-14-2003

line 9, 13, 17- no match for '_IO_istream_withassign& << int&
and a whole bunch of non- |value in assignment
and ANSI C++ comparison between pointer and integer

ThisNukes4u · 03-14-2003

And your "<<" on cin is supposed to be ">>".

**gcn_zelda** · 03-14-2003

thanks, y'all!

**RoD** · 03-14-2003

; on if is wrong, so is the direction of your operators on the cin lines. Also sign should be a char and encased in '' not "", heres a fixed version.

Code:

#include <iostream>

using namespace std;

int main()
{
cout << "Stephen's C++ Calculator" << endl;
cout << "Enter a number" << endl;
int a;
cin >> a;
cout << a << endl;
cout << "Now push a math sign" << endl;
char sign;
cin >> sign;
cout << a <<" "<< sign << endl;
cout << "Now push a second number" << endl;
int b;
cin >> b;
if (sign == '+')
{
int resultplus;
resultplus = a + b;
cout << resultplus << " is your answer!" << endl;
}
if(sign == '-')
{
int resultminus;
resultminus = a - b;
cout << resultminus << " is your answer!" << endl;
}
if(sign == '/')
{
int resultdivide;
resultdivide = a / b;
cout << resultdivide << " is your answer!" << endl;
}
if(sign == '*')
{
int resultmultiply;
resultmultiply = a*b;
cout << resultmultiply << " is your answer!" << endl;
}
return 0;
}

**Codeplug** · 03-14-2003

Code:

int this_is_input;
cin >> this_is_input;
cout << "this is output";
...
if (false);                           // <--- awnser                               
   this_will_always_execute(); //why?
...
int give_me_a_value;
give_me_a_value = 10 - 5; //NOT 10 - 5 = give_me_a_value
...
//input a char
char op;
cin >> op;
//compare a char
if (op == '+') {...}

Read your C++ book, and use code tags when posting code.

gg

[EDIT]
wow, I'm a slow typer....your homework is done, now study your C++ book!!

**gcn_zelda** · 03-14-2003

don't have a C++ book

**RoD** · 03-14-2003

Naviagte to the main site and read the tutorials. No offense intended, but you should start small, you had alot of syntax errors in there.

**gcn_zelda** · 03-14-2003

I already know BASIC, so

I learn from experience

**RoD** · 03-14-2003

The tutorials are a good place to start. I'm not saying go back to "Hello World" or anything, but a good tutorial never hurts.

**gcn_zelda** · 03-14-2003

when i run my edited program in Dev C++, it doesn't do anything even though it was compiled correctly.

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