cop.ch4.read_9.23.19_4:53

https://azeembooks.com/wp-content/uploads/2019/06/Starting-Out-With-Cpp-From-Control-Structures-Through-Objects-8th-Edition.pdf

9.23.19

LO1: Relational Operators
--------------------------------------------------------------
>, <, >=, <=, ==, !=

x > y relational expression, boolean expression, is x greater than y? true or false?
true is not always 1, and false is not always 0

// This program displays the values of true and false states.
#include <iostream>
using namespace std;

int main()
{
	bool trueValue, falseValue;
	int x = 5, y = 10;

	trueValue = x < y;
	falseValue = y == x;

	cout << "True is " << trueValue << endl;
	cout << "False is " << falseValue << endl;
	return 0;
}
OUTPUT
True is 1
False is 0

z = x < y   z is assigned 0, x is not less than y


LO2: The if Statement
--------------------------------------------------------------

#include <iostream>

int main() {
	int temp = 0;

	std::cout << "Enter temperature: ";
	std::cin >> temp;
	if (temp <= 60)
		std::cout << "Grab Coat!\n"; //if true display this, if false keep running program
	std::cout << "Eat breakfast\n";
	std::cout << "Grab keys\n";
	std::cout << "Leave House\n";

	return 0;
}

Is it cold outside?
	Yes
		Wear a coat. Continue running program -->
	No
		Continue running programm -->


LO3: Expanding the if Statement
--------------------------------------------------------------

#include <iostream>

int main() {
	int temp = 0;

	std::cout << "Enter temperature: ";
	std::cin >> temp;
	if (temp <= 60) {
		std::cout << "Grab Coat!\n"; //if true display this, if false keep running program
		std::cout << "Not the Dolphins coat!\n"; //also display this
	} //don't forget the braces!!!
	std::cout << "Eat breakfast\n";
	std::cout << "Grab keys\n";
	std::cout << "Leave House\n";

	return 0;
}

LO4: The if/else Statement
--------------------------------------------------------------

#include <iostream>

int main() {
	int temp = 0;

	std::cout << "Enter temperature: ";
	std::cin >> temp;
	if (temp <= 60) {
		std::cout << "Grab Coat!\n"; //if true display this, if false keep running program
		std::cout << "Not the Dolphins coat!\n"; //also display this
	} else {
	   std::cout << "Put on a regular shirt"; //if above is false, then display this
	}
	std::cout << "Eat breakfast\n";
	std::cout << "Grab keys\n";
	std::cout << "Leave House\n";

	return 0;
}

Is it cold outside?
	Yes
		Grab a coat, not the dolphins coat. Continue running program -->
	No
		Put on a regular shirt. Continue running programm -->

LO5: Nested if Statements
--------------------------------------------------------------

#include <iostream>

int main() {
	int temp = 0;

	std::cout << "Enter temperature: ";
	std::cin >> temp;
	if (temp <= 60) {
		std::cout << "Grab Coat!\n"; //if true display this, if false keep running program
		std::cout << "Not the Dolphins coat!\n"; //also display this
	} else {
		if (temp > 80) {
			std::cout << "Put on a short-sleeved shirt\n"; //if above is false, then display this
		} else {
			std::cout << "Put on a regular shirt\n"; //if above is false, then display this
		}
	}
	std::cout << "Eat breakfast\n";
	std::cout << "Grab keys\n";
	std::cout << "Leave House\n";

	return 0;
}

Is it cold outside?
	Yes
		Grab a coat, not the dolphins coat. Continue running program -->
	Is it hot?
		Yes
			Put on a short-sleeved shirt. Continue running programm -->
		No
				Put on a regular shirt. Continue running programm -->

LO6: The if/else if Statement
--------------------------------------------------------------

#include <iostream>

int main() {
	int temp = 0;

	std::cout << "Enter temperature: ";
	std::cin >> temp;
	if (temp <= 60) {
		std::cout << "Grab Coat!\n"; //if true display this, if false keep running program
		std::cout << "Not the Dolphins coat!\n"; //also display this
	} else if (temp > 80) {
		std::cout << "Put on a short-sleeved shirt\n"; //if above is false, then display this
	} else {
		std::cout << "Put on a regular shirt\n"; //if above is false, then display this
	}

	std::cout << "Eat breakfast\n";
	std::cout << "Grab keys\n";
	std::cout << "Leave House\n";

	return 0;
}

LO7: Flags
--------------------------------------------------------------


LO8: Logical Operators
--------------------------------------------------------------


LO9: Checking Numeric Ranges with Logical Operators
--------------------------------------------------------------


LO10: Menus
--------------------------------------------------------------


LO11: Focus on Software Engineering: Validating User Input
--------------------------------------------------------------


LO12: Comparing Characters and Strings
--------------------------------------------------------------


LO13: The Conditional Operator
--------------------------------------------------------------


LO14: The switch Statement
--------------------------------------------------------------

LO15: More About Blocks and Variable Scope
--------------------------------------------------------------


Checkpoint [LO1]
--------------------------------------------------------------
1.
A) T
B) T
C) F
D) T
E) T
F) F
G) T

2.
A) F
B) F
C) T

3.
A) T
B) F
C) F

4.
OUTPUT:
0
0
1
0

Checkpoint [LO2]
--------------------------------------------------------------
5.
if (x == 20)
	y = 0;

6.
if (price > 500)
	discountRate = 0.2;

7.
if (hours > 40)
	payrate *= 1.5;

8. TRUE

9. FALSE
if (calls = 20) // assigns value 20 to calls!!!
	rate *=0.5;

Checkpoint [LO3]
--------------------------------------------------------------
10.
if (sales > 50000) {
	commissionRate = 0.25;
	bonus = 2.50;
}

11.
It's missing the braces {}

Checkpoint [LO4]
--------------------------------------------------------------
12.
FALSE: cout's should be in the same order in both statements for them to display the same output ase they both are the same, x > y is the same as saying y <= x

13.
if (y == 100) {
	x = 1;
} else {
	x = 0;

14.
if (sales >= 50000.00) {
	comissionRate = 0.20;
} else {
	comissionRate = 0.10;
}

Checkpoint [LO5]
--------------------------------------------------------------
15. OUTPUT:
0: Zero

15: Zero
    Ten

30: Zero
    Ten
    Twenty

-1: [nothing, program doesn't finish running, because there's no else statement]

Checkpoint [LO6]
--------------------------------------------------------------
16.
if funny is not 1, then funny = 0, serious = 0 [TRUE] [funny = 7]
else if funny is 2, then funny = 10, serious = 10 [FALSE]
else funny = 1, serous = 1; [NOT AVAILABLE]
OUTPUT:
0 0

17.
1	1
3	2
4	2
5	3
10	3