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#include<iostream>
#define pi 3.142
using namespace std;
int GCD(int g, int d)
{
while( 1 )
{
g= g% d;
if( g == 0 )
return d;
d = d % g;
if( d == 0 )
return g;
}
}
int main()
{
long double c, a, b, l, g, r, d, s, q, v;
d=100;
string x, j;
char playAgain='y';
cout <<"This program is capable of doing negatives!"<<endl;
while (playAgain !='n')
{
cout << "Please choose the type of operation:"<< endl;
cout <<" "<<endl;
cout << "1) Addition" << endl;
cout << "2) Subtraction" << endl;
cout << "3) Multiplication" << endl;
cout << "4) Division" << endl;
cout << "5) F = C" << endl;
cout << "6) C = F" << endl;
cout << "7) Fraction to %" << endl;
cout << "8) % to Fraction" << endl;
cout << "9) Fraction to Decimal"<< endl;
cout << "10) Decimal to Fraction"<< endl;
cout << "11) % to Decimal" <<endl;
cout << "12) Decimal to %" <<endl;
cout << "13) Circumference" << endl;
cout << "14) Area of a Circle" << endl;
cout <<" "<< endl;
cin >> x;
cout <<" "<< endl;
if (x == "1")
{ cout << "Enter first number: ";
cin >> a;
cout <<" "<< endl;
cout << "Enter second number: ";
cin >> b;
cout <<" "<< endl;
c = a + b;
cout <<"Answer is: "<< c << endl;
}
if (x == "2")
{ cout << "Enter first number: ";
cin >> a;
cout <<" "<< endl;
cout << "Enter second number: ";
cin >> b;
cout <<" "<< endl;
c = a - b;
cout <<"Answer is: "<< c << endl;
}
if (x == "3")
{ cout << "Enter first number: ";
cin >> a;
cout <<" "<< endl;
cout << "Enter second number: ";
cin >> b;
cout <<" "<< endl;
c = a * b;
cout <<"Answer is: "<< c << endl;
}
if (x == "4")
{ cout << "Enter first number: ";
cin >> a;
cout <<" "<< endl;
cout << "Enter second number: ";
cin >> b;
cout <<" "<< endl;
c = a / b;
cout <<"Answer is: "<< c << endl;
}
if (x == "5")
{
cout <<" " << endl;
cout << "Enter the value of Fahrenheit: ";
cin >> a;
cout <<" " << endl;
c =(a-32)*5/9;
cout << c <<"C"<< endl;
}
if (x == "6")
{
cout <<" " << endl;
cout << "Enter the value of Celsius: ";
cin >> a;
cout <<" " << endl;
c = a * 9/5 + 32;
cout << c <<"F"<< endl;
}
if (x == "7")
{
cout << "Enter Numerator: ";
cin >> a;
cout <<" "<< endl;
cout << "Enter Denominator: ";
cin >> b;
cout <<" "<< endl;
c = a / b *100;
cout <<"Answer is: "<< c <<"%" << endl;
}
if (x == "8")
{
cout << "Enter %: ";
cin >> g;
cout <<" "<< endl;
cout <<"Answer is: "<< g <<"/100"<< endl;
cout <<"Do you want to change the Denominator? y/n "<< endl;
cout <<"Or do you want to simplfy it to the lowest? q/n"<< endl;
cout <<" "<<endl;
cin >> j;
cout <<" "<<endl;
}
if (j == "y")
{
cout <<" "<<endl;
cout << "What do you want to change the Denominator to?"<<endl;
cout <<" "<<endl;
cin >> l;
c = 100/l;
r = g/c;
cout <<" "<<endl;
cout <<"The Answer is: "<< r <<"/"<<l<<endl;
}
if (j == "q")
{
v=GCD(g, d);
s= g/v;
q= d/v;
cout <<g<<"/"<<d<<" at simplest is "<<s<<"/"<<q<<"!"<<endl;
}
if (x == "9")
{
cout << "Enter Numerator: ";
cin >> a;
cout <<" "<< endl;
cout << "Enter Denominator: ";
cin >> b;
cout <<" "<< endl;
c = a / b;
cout <<"Answer is: "<< c <<"!"<<endl;
}
if (x == "10")
{
cout << "Enter Decimal: ";
cin >> a;
cout <<" "<< endl;
g = a * 100;
cout <<"Answer is: "<< g <<"/100!"<<endl;
cout <<"Do you want to change the Denominator? y/n "<< endl;
cout <<"Or do you want to simplfy it to the lowest? q/n"<< endl;
cout <<" "<<endl;
cin >> j;
cout <<" "<<endl;
}
if (j == "y")
{
cout <<" "<<endl;
cout << "What do you want to change the Denominator to?"<<endl;
cout <<" "<<endl;
cin >> l;
c = 100/l;
r = g/c;
cout <<" "<<endl;
cout <<"The Answer is: "<< r <<"/"<<l<<endl;
}
if (j == "q")
{
v=GCD(g, d);
s= g/v;
q= d/v;
cout <<g<<"/"<<d<<" at simplest is "<<s<<"/"<<q<<"!"<<endl;
}
if (x == "11")
{
cout << "Enter %: ";
cin >> a;
cout <<" "<< endl;
c = a / 100;
cout <<"Answer is: "<< c <<"!"<<endl;
}
if (x == "12")
{
cout << "Enter Decimal: ";
cin >> a;
cout <<" "<< endl;
c = a * 100;
cout <<"Answer is: "<< c <<"%!"<<endl;
}
if (x == "13")
{ cout << "Enter Radius: ";
cin >> a;
cout <<" "<< endl;
c = a * 2 * pi;
cout <<"Answer is: "<< c << endl;
}
if (x == "14")
{ cout << "Enter Radius: ";
cin >> a;
cout <<" "<< endl;
c = a * pi * a;
cout <<"Answer is: "<< c << endl;
}
do { cout <<" "<< endl;
cout << "Do you want to calculate again? y/n: ";
cin >> playAgain;
cout <<" "<< endl;
} while (playAgain !='y' && playAgain !='n');
}
cout << "Okay, see you next time. Thankyou for using a program by Anmol Sethi!" << endl;
system ("pause");
return (0);
}
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