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//By behzad khoker
//Beta (1.2)
//Please reply and tell me what sholud do to improve this
//---------------------------------------------
#include <iostream>
#include <math.h>
using namespace std;
//Operation starts here------------------------------------------
void sum(){
cout<<"Enter a number"<<endl;
int num,num2,ans;
cin>>num;
cout<<"Enter another number"<<endl;
cin>>num2;
ans=num+num2;
cout<<"The answer is "<<ans<<endl;
}
void subtract(){
cout<<"Enter a large number"<<endl;
int num,num2,ans;
cin>>num;
cout<<"Enter a small number"<<endl;
cin>>num2;
ans=num-num2;
cout<<"The answer is "<<ans<<endl;
}
void multiply(){
cout<<"Enter a number"<<endl;
int num,num2,ans;
cin>>num;
cout<<"Enter another number"<<endl;
cin>>num2;
ans=num*num2;
cout<<"The answer is "<<ans<<endl;
}
void divide(){
cout<<"Enter a large number"<<endl;
int num,num2,ans;
cin>>num;
cout<<"Enter a small number"<<endl;
cin>>num2;
ans=num/num2;
cout<<"The answer is "<<ans<<endl;
}
void sin(){
cout<<"1)sin 2)cos 3)tan"<<endl;
int enter;
float num;
cin>>enter;
switch (enter)
{
case 1:
cout<<"enter a number"<<endl;
cin>>num;
cout<<"sin "<<num<<" is"<<sin(num);
break;
case 2:
cout<<"enter a number"<<endl;
cin>>num;
cout<<"cos "<<num<<" is"<<cos(num);
break;
case 3:
cout<<"enter a number"<<endl;
cin>>num;
cout<<"tan "<<num<<" is"<<tan(num);
break;
default:
cout<<"Error"<<endl;
break;
}
}
void temperature(){
float c,f;
cout << "Enter Temperature in Fahrenheit : ";
cin >>f;
c = (f - 32)*5/9;
cout << f<<" Fahrenheit temperature is equal to Centigrade = " << c;
}
void equation(){
float a,b,c,ans;
cout<<"Enter A"<<endl;
cin>>a;
cout<<"enter B"<<endl;
cin>>b;
cout<<"Enter c"<<endl;
cin>>c;
ans= (-b + sqrt( b*b - ( 4*a*c ))) / (2 * a) ;
cout<<"X ="<<ans<<endl;
}
void calculator(){
do{ system("cls");
int ent;
cout<<endl<<"What do you want to do \n1)add \n2)subtract \n3)multiply \n4)divide\n5)cos,tan,sin\n6)temperature conversion\n7)quadratic equation \n------------------------------------------------"<<endl;
cin>>ent;
switch (ent)
{
case 1:
sum();
break;
case 2:
subtract();
break;
case 3:
multiply();
break;
case 4:
divide();
break;
case 5:
sin();
break;
case 6:
temperature();
break;
case 7:
equation();
break;
default:
cout<<"invalid\n";
break;}
system("pause");
}while(1);
}
//Operation Ends here------------------------------------------
void main(){
calculator();
}
//------------------------------------------------------------------------------------------
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