Add a bunch of code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 117 insertions, 0 deletions

diff --git a/CPP/Basics/flow.cpp b/CPP/Basics/flow.cpp
new file mode 100644
index 0000000..82b7062
--- /dev/null
+++ b/CPP/Basics/flow.cpp
@@ -0,0 +1,117 @@
+#include <iostream>
+#include <vector>
+
+void ifs(void) {
+	int a = 1024;
+	bool flag = false;
+	char letter = 'E';
+
+	if (a > 1000)
+		std::cout << "Warning: over 1k" << std::endl;
+
+	if (a % 2)
+		std::cout << "a is odd" << std::endl;
+	else
+		std::cout << "a is even" << std::endl;
+
+	std::cout << "The letter " << letter <<  " is ";
+
+	if (letter != 'a' && letter != 'e' && letter != 'i' &&
+	    letter != 'o' && letter != 'u' &&
+	    letter != 'A' && letter != 'E' && letter != 'I' &&
+	    letter != 'O' && letter != 'U')
+		std::cout << "not ";
+	std::cout << "a vowel" << std::endl;
+
+	if (flag)
+		std::cout << "The flag is true." << std::endl;
+}
+
+void switches() {
+
+	float num1, num2, result;
+	char op;
+
+	std::cout << "Enter operand 1: " << std::endl;
+	std::cin >> num1;
+	std::cout << "Enter operand 2: " << std::endl;
+	std::cin >> num2;
+	std::cout << "Choose operation: + - * /: " << std::endl;
+	std::cin >> op;
+
+	switch (op) {
+		case '+':
+			result = num1 + num2;
+			break;
+		case '-':
+			result = num1 - num2;
+			break;
+		case '*':
+			result = num1 * num2;
+			break;
+		case '/':
+			result = num1 / num2;
+			break;
+		default:
+			std::cout << "Invalid Operation." << std::endl;
+			return;
+	}
+	std::cout << "The result is: " << result << std::endl;
+}
+
+void LWhile() {
+
+
+	// Declare and initialize a vector and an iterator
+	// in this case iterator is a type inside vector class
+	std::vector<int> numbers = {12, 25, 31, 55, 24, 32, 99};
+	std::vector<int>::iterator ptr = numbers.begin();
+
+	// We can use auto type to avoid the mess up above:
+	auto ptr_auto = numbers.begin();
+	int i = 0;
+
+	while (ptr != numbers.end()) {
+		std::cout << *ptr << " ";
+		ptr = std::next(ptr, 1);
+	}
+	std::cout << std::endl;
+	do {
+		std::cout << numbers[i] << ":" << *ptr_auto << " ";
+		i++;
+		ptr_auto = std::next(ptr_auto, 1);
+	}while(i < numbers.size());
+	std::cout << std::endl;
+}
+
+void LFor() {
+	std::vector<int> numbers = {12, 25, 31, 55, 24, 32, 99};
+	std::vector<int>::iterator ptr = numbers.begin();
+	float avg = 0;
+
+	for(int i = 0; i < numbers.size() ; i++)
+		avg += numbers[i];
+
+	avg /= numbers.size();
+	std::cout << "The average is: " << avg << std::endl;
+
+	// C++11 Iterator based for
+	avg = 0;
+
+	// The iterator will copy the data from each element within the vector,
+	// to the iterator variable (iter) here. We may want to access by
+	// reference instead of copying it
+	// READ AS: for each iter in numbers
+	for(int iter : numbers)
+		avg += iter;
+	avg /= numbers.size();
+	std::cout << "The average is: " << avg << std::endl;
+}
+
+int main(void) {
+	ifs();
+	switches();
+	LWhile();
+	LFor();
+	return 0;
+}