how to make 1/0

[NicholasIT]

mayb i have a condition that
when 1/0
then will cout infinity
or the value will return to infinity ?

[NicholasIT]

if(tanx =)    //what should i put in the condition ??
	{
	cout.width(10);
	cout<<"Your Tangent Value is" <<" = " ;
	cout.width(15);
	cout<<"Infinity"<<endl;
	}

[Alexander]

The code to catch floating point divisions by zero involves fpe catches and pragmas I'm not willing to dig up, the most simple way you can handle it is to check if the divisor is zero in the first place!

What example code throws the infinity error?

[NicholasIT]

void allResult2(double inputX)
{
	double sinx,cosx,tanx;
	double cosecant,secant,cotangent;
	bool error=true;
	sinx=sinxFunc(inputX);
	cosx=cosFunc(inputX);
	tanx=tanFunc(inputX);
	cout.precision(7);   //set decimal
	cout.setf(ios::fixed);   //display all numb

	if(sinx ==0 || sinx==-0||cosx==-0|| cosx ==0 ||tanx==-0 || tanx ==0) 
	{
		error =true;   //cannot be zero
	}

	cosecant=1 / sinx;
	secant= 1 /  cosx;
	cotangent= 1 / tanx;

	cout<<"--------------------------------------------------"<<endl;
	cout<<"\t              Your Result                       "<<endl;
	cout<<"--------------------------------------------------"<<endl;
	if(error ==true)
	{
	cout.width(10);
	cout<<"Your Cosecant Value is  "  <<" = " ;
	cout.width(20);
	cout<<"Infinity"<<endl;
	}
	else
	{
	cout.width(10);
	cout<<"Your Cosecant Value is  "  <<" = " ;
	cout.width(20);
	cout<<cosecant<<endl;
	}

	if(error ==true)
	{
		cout.width(10);
		cout<<"Your Secant Value is    "  <<" = " ;
		cout.width(20);
		cout<<"Infinity"<<endl;
	}
	else
	{
		cout.width(10);
		cout<<"Your Secant Value is    "  <<" = " ;
		cout.width(20);
		cout<<secant<<endl;
	}

	if(error ==true)
	{
		cout.width(10);
		cout<<"Your Cotangent Value is "  <<" = " ;
		cout.width(20);
		cout<<"Infinity"<<endl;
	}
	else
	{
		cout.width(10);
		cout<<"Your Cotangent Value is "  <<" = " ;
		cout.width(20);
		cout<<cotangent<<endl;
	}
	cout<<"---------------------End--------------------------"<<endl;
	system("pause");
}//display result  cot,cose,sec

hmm,i tried to code like this ,but its not work ,all return infinity for me @@
any clues?

[NicholasIT]

void allResult2(double inputX)
{
	double sinx,cosx,tanx;
	double cosecant,secant,cotangent;
	bool error=true;
	sinx=sinxFunc(inputX);
	cosx=cosFunc(inputX);
	tanx=tanFunc(inputX);
	cout.precision(7);   //set decimal
	cout.setf(ios::fixed);   //display all numb

	if(sinx ==0 || sinx==-0||cosx==-0|| cosx ==0 ||tanx==-0 || tanx ==0) 
	{
		error =true;   //cannot be zero
	}

	cosecant=1 / sinx;
	secant= 1 /  cosx;
	cotangent= 1 / tanx;

	cout<<"--------------------------------------------------"<<endl;
	cout<<"\t              Your Result                       "<<endl;
	cout<<"--------------------------------------------------"<<endl;
	if(error ==true)
	{
	cout.width(10);
	cout<<"Your Cosecant Value is  "  <<" = " ;
	cout.width(20);
	cout<<"Infinity"<<endl;
	}
	else
	{
	cout.width(10);
	cout<<"Your Cosecant Value is  "  <<" = " ;
	cout.width(20);
	cout<<cosecant<<endl;
	}

	if(error ==true)
	{
		cout.width(10);
		cout<<"Your Secant Value is    "  <<" = " ;
		cout.width(20);
		cout<<"Infinity"<<endl;
	}
	else
	{
		cout.width(10);
		cout<<"Your Secant Value is    "  <<" = " ;
		cout.width(20);
		cout<<secant<<endl;
	}

	if(error ==true)
	{
		cout.width(10);
		cout<<"Your Cotangent Value is "  <<" = " ;
		cout.width(20);
		cout<<"Infinity"<<endl;
	}
	else
	{
		cout.width(10);
		cout<<"Your Cotangent Value is "  <<" = " ;
		cout.width(20);
		cout<<cotangent<<endl;
	}
	cout<<"---------------------End--------------------------"<<endl;
	system("pause");
}//display result  cot,cose,sec

hmm,i tried to code like this ,but its not work ,all return infinity for me @@
any clues?

[Flying Dutchman]

This should work.

void allResult2(double inputX) {
	double sinx;
	double cosx;
	double tanx;

	double cosecant;
	double secant;
	double cotangent;

	bool error = false;         // no errors, yet

	sinx = sinxFunc(inputX);
	cosx = cosFunc(inputX);
	tanx = tanFunc(inputX);

	cout.precision(7);          //set decimal
	cout.setf(ios::fixed);      //display all numb

	if (sinx == 0 || sinx == -0 ||
            cosx == 0 || cosx == -0 ||
            tanx == 0 || tanx == -0)
	{
		error = true;           //cannot be zero
	}

	cosecant   = 1 / sinx;
	secant      = 1 / cosx;
	cotangent = 1 / tanx;

	cout << "--------------------------------------------------" << endl;
	cout << "\t              Your Result                       " << endl;
	cout << "--------------------------------------------------" << endl;

        string tabNames[3] = {"Cosecant", "Secant", "Cotangent"};
        double tabResult[3] = {cosecant, secant, cotangent};

	if (error) {
	    for (int i = 0; i < 3; i++) {
                cout.width(10);
                cout << "Your " << tabNames[i] << " value is = ";
                cout.width(20);
                cout << "Infinity" << endl;
	    }
	} else {
            for (int i = 0; i < 3; i++) {
                cout.width(10);
                cout << "Your " << tabNames[i] << " value is = ";
                cout.width(20);
                cout << tabResult[i] << endl;
	    }
        }

	cout << "---------------------End--------------------------" << endl;
	cin.get();
}

[NicholasIT]

erm,thanks for ur advice
however

      string tabNames[3] = {"Cosecant", "Secant", "Cotangent"};
        double tabResult[3] = {cosecant, secant, cotangent};

may i ask this coding is for ?
and the looping is for?

[NicholasIT]

erm,sorry ,i get what u did edy =) sory in rush to reply you...

void allResult(double inputX) //display sin,cos,tang
{
	double sinx,cosx,tanx;
	cout.precision(7);
	cout.setf(ios::fixed);

	bool error =false; // no error 

	sinx=sinxFunc(inputX);
	cosx=cosFunc(inputX);
	tanx=tanFunc(inputX);

	if(cosx == 0 || cosx == -0 )
	{
		error = true;           //cannot be zero
	}

	cout<<"--------------------------------------------------"<<endl;
	cout<<"\t               Your Result                      "<<endl;
	cout<<"--------------------------------------------------"<<endl;
	
        string tabNames[3] = {"SinX", "CosX", "Tangent"};
        double tabResult[3] = {sinx, cosx, tanx};

	if (error)
	{
		for (int i = 0; i < 3; i++)
		{
			cout.width(10);
			cout << "Your " << tabNames[i] << " value is = ";
			cout.width(20);
			cout << "Infinity" << endl;
		}
	} else 
	{
         for (int i = 0; i < 3; i++) 
		 {
                cout.width(10);
                cout << "Your " << tabNames[i] << " value is = ";
                cout.width(20);
                cout << tabResult[i] << endl;
		 }
	 }

	cout<<"---------------------End--------------------------"<<endl;
	cin.get();

	system("pause");
}

void allResult2(double inputX) 
{
	double sinx,cosx,tanx;

	double cosecant,secant,cotangent;

	bool error = false;         // no errors, yet

	sinx = sinxFunc(inputX);
	cosx = cosFunc(inputX);
	tanx = tanFunc(inputX);

	cout.precision(7);          //set decimal
	cout.setf(ios::fixed);      //display all numb

	if (sinx == 0 || sinx == -0 ||cosx == 0 || cosx == -0 ||tanx == 0 || tanx == -0)
	{
		error = true;           //cannot be zero
	}

	cosecant   = 1 / sinx;
	secant      = 1 / cosx;
	cotangent = 1 / tanx;

	cout << "--------------------------------------------------" << endl;
	cout << "\t              Your Result                       " << endl;
	cout << "--------------------------------------------------" << endl;

        string tabNames[3] = {"Cosecant", "Secant", "Cotangent"};
        double tabResult[3] = {cosecant, secant, cotangent};

	if (error) 
	{
	    for (int i = 0; i < 3; i++)
		{
                cout.width(10);
                cout << "Your " << tabNames[i] << " value is = ";
                cout.width(20);
                cout << "Infinity" << endl;
	    }
	} 
	else 
	{
            for (int i = 0; i < 3; i++) 
			{
                cout.width(10);
                cout << "Your " << tabNames[i] << " value is = ";
                cout.width(20);
                cout << tabResult[i] << endl;
			}
    }

	cout << "---------------------End--------------------------" << endl;
	cin.get();

	system("pause");
}

this is my result coding,however,it cannot work @@it still showing the weird result when tangent degree 90 ,270,450,630