computer science: c++ (QT) Hw

#include <iostream>

using namespace std;

int main(int argc, char *argv[])

{

int num1, denom1;

char junk;

cout<<"Please enter your first fraction: ";

cin>>num1>>junk>>denom1;

cout<<"You entered: "<<num1<<"/"<<denom1<<endl;

return 0;

}

#include <iostream> //All console input and output

#include <cmath> //Trig, sqrt, etc

#include <cstdlib> //Used for system(), abs, etc

using namespace std;
int main(int argc, char *argv[])
{
    double degC, degF;
    char answer;
    do
    {
        cout<<"Please enter the temperature in degrees Centigrade: ";
        cin>>degC;
        degF = 9./5.*degC + 32;
        cout<<degC<<" degrees Centigrade is "
            <<degF
            <<" degrees Farenheit"
            <<endl<<endl
            <<"Do you want to do this again? ";
        cin>>answer;
    }while(answer == 'Y' || answer == 'y');
    return 0;
}

#include <iostream>
#include <cmath>
using namespace std;
/*
 * This program will solve the quadratic equation.
 *
 * Written on March 20, 2017
 * by
 * Someone
 *
 */
int main(int argc, char *argv[])
{
    double a, b, c, det, minusBover2a;
    char answer;
    do
    {
        cout<<"Please enter the coefficients of your quadratic: ";
        cin>>a>>b>>c;
        minusBover2a = -b/(2*a);
        det = b*b - 4 * a * c;
//        det = pow(b,2.) - 4 * a * c;
        if(det < 0) //Imaginary Roots
        {
            det *= -1; //det = det * - 1;
            cout<<"x = ";
            if(minusBover2a != 0) //If with no else
                 cout<<minusBover2a<<" ";
            cout<<"+/- "<<sqrt(det)/(2*a)<<"i"<<endl;
        }
        else //another if... also called ladder-if
            if(det == 0) //One real root
                cout<<"x = "<<minusBover2a<<endl;
            else //Two real roots
            {
                double x1 = minusBover2a + sqrt(det)/(2*a),
                       x2 = minusBover2a - sqrt(det)/(2*a);
                cout<<"x = "<<x1<<" or "<<x2<<endl;
            }
        cout<<endl<<"Do you want to do this again? ";
        cin>>answer;
    }while(answer == 'Y' || answer == 'y');//Post test loop
    return 0;
}


#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
    int first, second;
    cout<<"Please enter two integers, seperated by a space: ";
    cin>>first>>second;
    if(first > second)
        cout<<first<<" is greater than "<<second<<endl;
    else
        if(first == second)
            cout<<"you entered the same number twice!"<<endl;
        else
            cout<<second<<" is greater than "<<first<<endl;
    return 0;
}