Equation printing program

[sicarie]

Okay, I'm getting a weird error with your declaration of char operator, but besides that, you need to research variables in C/C++. You have several times

x + y = z

This takes the value in z, stores it in y, and then adds x. But you never save it, so it doesn't so anything with that value. You want:

z = x + y

Then you will have that value in z, and can use it later.

[socondc22]

Can you post your error message?

And you want for a section of your code to repeat/loop while the user keeps inputting 'y'?

I want for my whole program to rerun after at the end, but let it ask the user if he wants to rerun it or not.

expected primary-expression before "char"
expected ';' before char
expected identifier before ';' token
expected ')' before string constant
could not convert 'std::operator= =' to 'bool'
non-lvalue in assignment
invalid operands of types 'int' and 'const char[3]' to binary 'operator<<'



thats some of them but they basically repeat because of each section

[socondc22]

Okay, I'm getting a weird error with your declaration of char operator, but besides that, you need to research variables in C/C++. You have several times

x + y = z

This takes the value in z, stores it in y, and then adds x. But you never save it, so it doesn't so anything with that value. You want:

z = x + y

Then you will have that value in z, and can use it later.

ya i did that last program i tried to write too.. you think i would have learned

[socondc22]

I want for my whole program to rerun after at the end, but let it ask the user if he wants to rerun it or not.

expected primary-expression before "char"
expected ';' before char
expected identifier before ';' token
expected ')' before string constant
could not convert 'std::operator= =' to 'bool'
non-lvalue in assignment
invalid operands of types 'int' and 'const char[3]' to binary 'operator<<'



thats some of them but they basically repeat because of each section

Any ideas on what i should do because i need to try to get it done for tomorrow?

[socondc22]

Equation printing program

My code is trying to ask for integer,operato r, and another integer... and then use it to form an equation and print it out showing the exact equation... any ideas?
[code=cpp]
int main()
{
int x, y, z;
char operator;

cout<< " Welcome to the Calculator.\n";
cout<< " Input first number.\n";
cin>> x;
cout<< " Input + for addition, - for subtraction, * for multiplication, or / for division.\n";
cin>> operator;
cout<< " Input second number.\n";
cin>> y;


if (operator=+)
{
z=x+y;
cout<<"The Answer is: "<<x+y=z<<".\n" ;
}

if (operator=-)
{
z=x-y;
cout<<"The Answer is: "<<x-y=z<<".\n";
}

if (operator=*)
{
z=x*y:
cout<<"The Answer is: "<<x*y=z<<".\n" ;
}

if (operator=/)
{
z=x/y;
cout<<"The Answer is: "<<(z=x/y)<<".\n";
cout<<"The Remainder is: "<<(x%y)<<".\n" ;
}

else
cout<<"Invalid Operator";

return 0;
}[/code]

[ilikepython]

My code is trying to ask for integer,operato r, and another integer... and then use it to form an equation and print it out showing the exact equation... any ideas?

int main()
{
int x, y, z;
char operator;

cout<< " Welcome to the Calculator.\n";
cout<< " Input first number.\n";
cin>> x;
cout<< " Input + for addition, - for subtraction, * for multiplication, or / for division.\n";
cin>> operator;
cout<< " Input second number.\n";
cin>> y;


if (operator=+)
{
z=x+y;
cout<<"The Answer is: "<<x+y=z<<".\n" ;
}

if (operator=-)
{
z=x-y;
cout<<"The Answer is: "<<x-y=z<<".\n";
}

if (operator=*)
{
z=x*y:
cout<<"The Answer is: "<<x*y=z<<".\n" ;
}

if (operator=/)
{
z=x/y;
cout<<"The Answer is: "<<(z=x/y)<<".\n";
cout<<"The Remainder is: "<<(x%y)<<".\n" ;
}

else
cout<<"Invalid Operator";

return 0;
}

Your if statements are wrong:
[code=cpp]
if (operator == "+")
{}
else if (operator== "-")
{}
// ... so on ...[/code]
Also, you might have to delete the new line in the stream left by cin.

[socondc22]

Your if statements are wrong:
[code=cpp]
if (operator == "+")
{}
else if (operator== "-")
{}
// ... so on ...[/code]
Also, you might have to delete the new line in the stream left by cin.

What did you mean by that last part... You are probably right with the first part but that didnt change any of the error messages im getting with my code.. It actually gave me totally different errors..

[ilikepython]

What did you mean by that last part... You are probably right with the first part but that didnt change any of the error messages im getting with my code.. It actually gave me totally different errors..

Also, when you display the answer you do this:
[code=cpp]
z = x + y;
cout << "The answer is: " << z << endl;

// ... or ...
cout << "The answer is: " << x + y << endl; // no need for z variable
[/code]

[socondc22]

Also, when you display the answer you do this:
[code=cpp]
z = x + y;
cout << "The answer is: " << z << endl;

// ... or ...
cout << "The answer is: " << x + y << endl; // no need for z variable
[/code]

Well i was trying to make it so it would display my equation... so if x =5 and y= 6 it was print out 5+6=11

[ilikepython]

Well i was trying to make it so it would display my equation... so if x =5 and y= 6 it was print out 5+6=11

Well ok. You have the two numbers in the variables and you know how to print with cout so I think you could figure this out yourself. Remember you need to use quotes unless you are printing a variable.

[socondc22]

Well ok. You have the two numbers in the variables and you know how to print with cout so I think you could figure this out yourself. Remember you need to use quotes unless you are printing a variable.

I thought about what i should do so i put quotes around the +, - and such and i got a big error message... was that wrong?

[socondc22]

I thought about what i should do so i put quotes around the +, - and such and i got a big error message... was that wrong?

I think i figured that part out.... i have one error for every if statement line left...

it says expected primary expression before char and operator== not defined and expected ) before string constant

[ilikepython]

I thought about what i should do so i put quotes around the +, - and such and i got a big error message... was that wrong?

Did you do this:
[code=cpp]
cout << "The answer is: " << x "-" y "=" z << endl;
[/code]
You need to sperate them:
[code=cpp]
cout << "The asnwer is: " << x << "-" << y << "=" << z << endl;
[/code]

[socondc22]

Did you do this:
[code=cpp]
cout << "The answer is: " << x "-" y "=" z << endl;
[/code]
You need to sperate them:
[code=cpp]
cout << "The asnwer is: " << x << "-" << y << "=" << z << endl;
[/code]

it says expected identifier before ")" token for this part...

else if ((operator) = "/")

[socondc22]

a couple more erros left in my code??

int main()
{
int x, y, z;
char operator;

cout<< " Welcome to the Calculator.\n";
cout<< " Input first number.\n";
cin>> x;
cout<< " Input + for addition, - for subtraction, * for multiplication, or / for division.\n";
cin>> operator;
cout<< " Input second number.\n";
cin>> y;


if ((operator) = "+")
{
z=x+y;
cout<<"The Answer is: "<<x<<"+"<<y<<" ="<<z<<".\n" ;
}

else if ((operator) = "-")
{
z=x-y;
cout<<"The Answer is: "<<x<<"-"<<y<<"="<<z<<" .\n";
}

else if ((operator) = "*")
{
z=x*y;
cout<<"The Answer is: "<<x<<"*"<<y<<" ="<<z<<".\n" ;
}

else if ((operator) = "/")
{
z=x/y;
cout<<"The Answer is: "<<x<<"/"<<y<<"="<<z<<" .\n";
cout<<"The Remainder is: "<<x<<"%"<<y<<" .\n";
}

else
(cout<<"Invalid Operator");

return 0;
}


I'm just stuck and don't know what to do... plus i need to make it rerun the program at the end by asking the user whether or not he wants to rerun the program.... but i have no idea...