Tutorial 2
Exercise 1:
#include <iostream>
//Seb Crowhurst tutorial 2 exercise 1
int main()
{
int num1, num2, num3;
std::cout << “Please enter a number: “;
std::cin >> num1;
std::cout << “Please enter a second number: “;
std::cin >> num2;
std::cout << “Please enter a third number: “;
std::cin >> num3;
std::cout << “Your numbers were: ” << num3 << “,” << num2 << “,” << num1 << “.”;
return 0;
}
Exercise 2:
#include <iostream>
using std::cout;
using std::cin;
int main()
{
float num1, num2, num3, sum, average ;
cout << “Please enter a number (can be decimal): ” ;
cin >> num1;
cout << “Please enter a second number: ” ;
cin >> num2;
cout << “Please enter a third number: ” ;
cin >> num3;
sum = num1 + num2 + num3 ;
average = (num1+ num2 + num3) / 3 ;
cout << “Thank you, the sum of your numbers is: ” << num1 << ” + ” << num2 << ” + ” << num3 << ” = ” << sum ;
cout << “The average of your numbers is: ” << average;
return 0;
}
Exercise 3:
#include <iostream>
using std::cout;
using std::cin;
int main()
{
float radius, circumference, area ;
cout << “Please enter a radius: “;
cin >> radius;
circumference = (radius * 2) * 3.14;
area = 3.14 * (radius * radius);
cout << “Here is the circumference: ” << circumference << ” Here is the area: ” << area;
return 0;
}
In this code it would be a good idea to make pi a constant as the number will never need to change as it is the same in all calculations.
Exercise 4:
#include <iostream>
using std::cout;
using std::cin;
int main()
{
// there is no float modulo as it only works with integers
float float1, float2, floatadd, floatdivide, floattimes, floatminus, fiadd, fidivide, fitimes, fiminus ;
int int1, int2, intadd, intdivide, inttimes, intminus, intmodulo ;
cout << “Please enter one decimal number: ” ;
cin >> float1 ;
cout << “Please enter a second decimal number: ” ;
cin >> float2 ;
cout << “Please enter one non-decimal number: ” ;
cin >> int1 ;
cout << “Please enter one non-decimal number: ” ;
cin >> int2 ;
floatadd = float1 + float2, floatdivide = float1 / float2, floattimes = float1 * float2, floatminus + float1 – float2;
intadd = int1 + int2, intdivide = int1 / int2, inttimes = int1 * int2, intminus = int1 – int2, intmodulo = int1 % int2;
fiadd = float1 + int1, fidivide = float1 / int1, fitimes = float1 * int1 fiminus = float1 – int1;
cout << “Here are the results for your floats: ” << ” +: ” << floatadd << ” ~ /: ” << floatdivide << ” ~ *: ” << floattimes << ” ~ -: ” << floatminus ;
cout << ” Here are the results for your integers: ” << ” +: ” << intadd << ” ~ /: ” << intdivide << ” ~ *: ” << inttimes << ” ~ -: ” << intminus << ” ~ %: ” << intmodulo;
cout << ” Here are the results for the first float and first integer: ” << ” +: ” << fiadd << ” ~ /: ” << fidivide << ” ~ *: ” << fitimes << ” ~ -: ” << fiminus;
return 0;
}
Exercise 5:
#include <iostream>
using std::cout;
using std::cin;
int main()
{
int num1;
float num2;
cout << “Please enter a number: “;
cin >> num1
cout << “Please enter a second number: “;
cin >> num2
num1++;
num2++;
++num1;
++num2;
cout << “Postfix: ” << num1++;
cout << ” Prefix: ” << ++num1;
cout << ” Number 2 postfix: ” << num2++;
cout << ” Number 2 prefix: ” << ++num2;
num1 *= num2 + 3;
return 0;
}
Exercise 6:
#include <iostream>
using std::cout;
using std::cin;
int main()
{
int num1, num2, num3;
cout << “Please enter a number: ” ;
cin >> num1;
cout << “Please enter a second number: “;
cin >> num2;
cout << “Please enter a third number: “;
cin >> num3;
cout << “The sum of your numbers is: ” << (num1 + num2) * num3;
return 0;
}
Exercise 7
#include <iostream>
using std::cout;
using std::cin;
enum rocks{Garnet=75, Heulandite = 25, Hematite = 10, Halite = 15};
int main()
{
const int constint = 125;
const float constfl = 7.5f;
rocks shiney = Garnet;
rocks mineral = Heulandite;
rocks oxide = Hematite;
rocks sediment = Halite;
cout << constint << “\n”;
cout << constfl << “\n”;
cout << “Garnet = ” << Garnet << “\nHeulandite = ” << Heulandite << “\nHematite = ” << Hematite << “\nHalite = ” << Halite;
return 0;
}
Seb Crowhurst Game Development 