ScreenHunter_48 Aug. 21 09.54

github.com/FeetWetCoding/FeetWetCoding/blob/master/exerci...

 

// copyright (c) 2011 Robert Holder, Janice Dugger.

// See HELP.html included in this distribution.

 

#include

 

using std::string;

 

void writeFalse()

{

SeeOut seeout;

seeout.setColor(DARKRED);

seeout << "FALSE: ";

seeout.setColor(BLACK);

}

 

void writeTrue()

{

SeeOut seeout;

seeout.setColor(BLUE);

seeout << "TRUE: ";

seeout.setColor(BLACK);

}

 

void IfThen3::runExercise()

{

int x = 10, y = 20, z = 10; // = is pronounced GETS, == is pronounced EQUALS

float a = 0.0, b = 1.5, c = 98.6;

string name1 = "John";

string name2 = "Joan";

string name3 = "john";

string name4 = "John";

 

// This exercise is for you to refer back to when you want to see a working example

// of a specific conditional logic test. There is nothing for you to solve here.

// Understanding comparison logic is important in order to be able to code and debug.

// Take a break if your brain gets tired from this stuff! (As mine does! :-)

 

fwcText("Reference Exercise:", 50, 150, BLUE, 20);

fwcText("no solution needed.", 50, 180, BLUE, 20);

 

seeout.setFontSize(8);

 

seeout << "Try to understand in every case below why each is true or false.\n\n";

 

// basic comparison logic

if ( x == y ) writeTrue();

else writeFalse();

seeout << "Conditional 1: " << x << " == " << y << "\n";

 

if ( x == z ) writeTrue();

else writeFalse();

seeout << "Conditional 2: " << x << " == " << z << "\n";

 

if ( x != y ) writeTrue();

else writeFalse();

seeout << "Conditional 3: " << x << " != " << y << "\n";

 

if ( x != z ) writeTrue();

else writeFalse();

seeout << "Conditional 4: " << x << " != " << z << "\n";

 

if ( x < y ) writeTrue();

else writeFalse();

seeout << "Conditional 5: " << x << " < " << y < y ) writeTrue();

else writeFalse();

seeout << "Conditional 6: " << x < " << y << "\n";

 

// you can compare ints and floats. just be careful to remember that you can't store

// fractional numbers in an int.

if ( a < b ) writeTrue();

else writeFalse();

seeout << "Conditional 7: " << a << " < " << b << "\n";

 

if ( a < x ) writeTrue();

else writeFalse();

seeout << "Conditional 8: " << a << " < " << x << "\n";

 

// AND, OR, NOT and XOR

if (true) writeTrue();

else writeFalse();

seeout << "Conditional 9: true\n";

 

if (false) writeTrue();

else writeFalse();

seeout << "Conditional 10: false\n";

 

if (!true) writeTrue();

else writeFalse();

seeout << "Conditional 11: NOT-true == false\n";

 

if (!false) writeTrue();

else writeFalse();

seeout << "Conditional 12: NOT-false == true\n";

 

if ( !x ) writeTrue();

else writeFalse();

seeout << "Conditional 13: !" << x << "\n";

 

if ( !a ) writeTrue();

else writeFalse();

seeout << "Conditional 14: !" << a << "\n";

 

if ( a < x && b < y ) writeTrue();

else writeFalse();

seeout << "Conditional 15: " << a << " < " << x << " AND ";

seeout << b << " < " << y < x && b < y ) writeTrue();

else writeFalse();

seeout << "Conditional 16: " << a < " << x << " AND ";

seeout << b << " < " << y << "\n";

 

if ( a < x && b < y && c < z ) writeTrue();

else writeFalse();

seeout << "Conditional 17: " << a << " < " << x << " AND " << b << " < " << y;

seeout << " AND " << c << " < " << z << "\n";

 

if ( a < x || b < y || c < z ) writeTrue();

else writeFalse();

seeout << "Conditional 18: " << a << " < " << x << " OR " << b << " < " << y;

seeout << " OR " << c << " < " << z << "\n";

 

if ( (a < x && b < y) && ( x < y && y < c ) ) writeTrue();

else writeFalse();

seeout << "Conditional 19: ( " << a << " < " << x << " AND ";

seeout << b << " < " << y << " )";

seeout << " AND ( " << x << " < " << y << " AND ";

seeout << y << " < " << c << " )\n";

 

if ( ( a < x && b < y) && ( x c ) ) writeTrue();

else writeFalse();

seeout << "Conditional 20: ( " << a << " < " << x << " AND ";

seeout << b << " < " << y << " )";

seeout << " AND";

seeout << " ( " << x << " < " << y << " AND ";

seeout << y < " << c << " )\n";

 

if ( (a < x && b < y) || ( x c ) ) writeTrue();

else writeFalse();

seeout << "Conditional 21: ( " << a << " < " << x << " AND ";

seeout << b << " < " << y << " )";

seeout << " OR";

seeout << " ( " << x << " < " << y << " AND ";

seeout << y < " << c < x) && !(b < y) ) writeTrue();

else writeFalse();

seeout << "Conditional 22: NOT (" << a < " << x << ") AND NOT ( ";

seeout << b << " < " << y < x && b < y) ) writeTrue();

else writeFalse();

seeout << "Conditional 23: NOT ( (" << a < " << x << " AND ";

seeout << b << " < " << y << " ) )\n";

 

if ( ( a < x || b < y ) && !( a < x && b < y ) ) writeTrue();

else writeFalse();

seeout << "Conditional 24: XOR (Exclusive OR):\n";

seeout << "( " << a << " < " << x << " OR " << b << " < " << y << ")";

seeout << " AND ( NOT ( " << a << " < " << x << " AND " << b << " < " << y < x || b x && b < y ) ) writeTrue();

else writeFalse();

seeout << "Conditional 25: XOR (Exclusive OR):\n";

seeout << "( " << a < " << x << " OR " << b << " < " << y << ")";

seeout << " AND ( NOT ( " << a < " << x << " AND " << b << " < " << y << ") )\n";

 

// string comparison

if ( name1 == name4 ) writeTrue();

else writeFalse();

seeout << "Conditional 26: " << name1 << " is the same string as " << name4 << "\n";

 

if ( name1 == name2 ) writeTrue();

else writeFalse();

seeout << "Conditional 27: " << name1 << " is the same string as " << name2 << "\n";

 

if ( name1 == name3 ) writeTrue();

else writeFalse();

seeout << "Conditional 28: " << name1 << " is the same string as " << name3 << "\n";

 

if ( name1 < name2 ) writeTrue();

else writeFalse();

seeout << "Conditional 29: " << name1 << " is alphanumerically less than " << name2 << "\n";

 

if ( name2 < name3 ) writeTrue();

else writeFalse();

seeout << "Conditional 30: " << name2 << " is alphanumerically less than " << name3 << "\n";

 

if ( name3 < name4 ) writeTrue();

else writeFalse();

seeout << "Conditional 31: " << name3 << " is alphanumerically less than " << name4 << "\n";

 

if (name1 < name3 ) writeTrue();

else writeFalse();

seeout << "Conditional 32: " << name1 << " is alphanumerically less than " << name3 << "\n";

}

Done