Calculator Problems

Well second day of class and needless to say I am more than rusty after taking a year and a half off ne how I am getting two errors when I am compiling and I can't figure them out. This calc is supposed to generate two random numbers and the user picks what he wants to do w/them and then he answers it then the program tells him if he is right or wrong.

Thanks for the help in advance :-)

Code:

---


#include<iostream.h>
#include<iomanip.h>
#include<stdlib.h>
#include<time.h>

double Add (double a, double b) //Addition
{
  cout << a << " + " << b << " = ";
  return (a+b);
}
double Multiply (double a, double b) //Multiplcation
{
  cout << a << " * " << b << " = ";
  return(a*b);
}
double Subtract (double a, double b) //Subtraction
{
  cout << a << " - " << b << " = ";
  return(a-b);
}
double Divide (double a, double b) //Dividing
{
  cout << a << " / " << b << " = ";
  return(a/b);
}




double main()
{
int num1;
int num2;
int choice;
int stop;
int ans;
int usans;

stop = 1;
while(stop < 2)
{
        cout << "C++ Assigment Two - Random Calculator" << endl;
        cout << "\n";
        srand(time(0)); //this will produce a new number after each execution.
        num1 = 1+rand()%20;
        num2 = 1+rand()%20;

        cout << "Do you wish to: (1)Add, (2)Subtract, (3)Multiply or (4)Divide ?" << endl;
                cin >> choice;

        switch (choice)  //Calculator Function
        {
                case 1: cout << num1 << "+" << num2;
                ans = num1 + num2;
                        break;
                case 2: cout << num1 << "x" << num2;
                ans = num1 x num2;
                        break;
                case 3: cout << num1 << "-" << num2;
                ans = num1 - num2;
                        break;
                case 4: cout << num1 << "/" << num2;
                ans = num1 / num2;
                        break;
        }

cin >> usans;
If (ans == usans)
 {
 cout<< "/nYour answer is correct"
 }
else
 {
 cout << "/nIncorrect Answer"
 }




                  cout <<"\n\nDo you wish to (E)xit or (R)estart";
                  char ch;
                  cin >> ch;

                  //this if statment will keep looping untill they enter E or e...
                  if(ch == 'E' || ch == 'e') stop = 2;
                  clrscr();

  }
}

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You may want to post the errors.

1) int main( ). Only int main( ).
2) if, not If.

Warning 1 = Coversion may lose sinificant digits in function main()
Warning 2 = Function should return a value in function main()

Again, use int main( ). You don't need to worry about main( ) returning a value, because it's OK not to.

Tried int main() and I still get the same two warnings the weird thing is warning number one brings me to this line of code:

Code:

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srand(time(0)); //this will produce a new number after each execution.

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And the second warning brings me to this line:

Code:

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} // the last one

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these are the things that I am catching from your code:

Code:

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ans = num1 x num2; // I'm guessing you want multiplication here so it should be
ans = (num1*num2);

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the next one is mentioned in the reply above

Code:

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If (ans == usans) // not If but if
cout<< "/nYour answer is correct" //you forgot a ';' at the end
cout << "/nIncorrect Answer" //here too!!!!

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other then that it should compile and run, but I don't think the desired result will be shown,

axon

I have to post some more:
replace /n with \n to get newline.
prompt user for the answer because the prog is very unclear when all you get is two numbers with an operator...what then?

axon

Seed the random number generator at the beginning of main(), not within your loop.

srand(unsigned(time(0)));

just picking:

Code:

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#include<iostream.h>
#include<iomanip.h>
#include<stdlib.h>
#include<time.h>

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should be:

Code:

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#include<iostream>
#include<iomanip>
#include<stdlib>
#include<time>

using namespace std;

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of course that's only if the compiler your using follows newer standards...

Couple corrections, cstdlib not stdlib, and ctime, not time. ;)

haha... yeah... forgot to add the 'c' before i posted... sorry