Thread: Puzzling problem

Code:

#include <iostream>
#include <cmath>

using namespace std;

void math()
{
	char line;
	float number;
	float answer;
	char yn = 'y';

	do{
   cout<<"enter what you want to do (m for math, o for math operations, s for square root, f for farenheit to celsius, c for celsius to farenheit)\n";
   cin>>line;
   if(line == 'o'){
	   cout<<"x,/,+,-,^,s(press enter then enter the number)\n";
	   answer = 0;
   }
  if(line == 's'){
	   cout<<"enter a number: ";
	   cin>>number;
	   answer = sqrt(number);
  }
if(line == 'm'){
		float x;
        float y;
        char a;
		float answer;
		cout<<"enter a problem\n";
	   cin>>x>>a>>y;
    switch (a){
	case 'x':
		answer = x*y;
		break;
	case '/':
		answer = x/y;
		break;
	case '+':
		answer = x+y;
		break;
	case '-':
		answer = x-y;
		break;
	case '^':
		answer = pow (x,y);
		break;
}
}
   if(line == 'c'){
	   float degrees;

	   cout<<"enter degrees celsius\n";
	   cin>> degrees;
	   answer = 1.8*degrees+32;
   }
   if(line == 'f'){
	   float degrees;

	   cout<<"enter degrees farenheit\n";
	   cin>> degrees;

	   answer = (degrees-32)*1.8;
   }
   cout<<answer<<endl;
   cout<<"Do you want to calculate something else<y/n>\n";
   cin>>yn;
	}while(yn == 'y');
}

Code:

#include <iostream>
#include "calc.h"

using namespace std;

int main()
{
	math();
}

my problem is when you do an equation (x,/,+,-,^) it gives you an error or the previous number, and this only happens when you press m at the beginning, no where else.

thanks