Started addition of C++ cheat

sheets/_c++/func

@@ -0,0 +1,29 @@
+// ### Functions 
+// a simple function 
+void functionName() {}
+
+// function with parameters of integers
+void functionName(int param1, int param2) {}
+
+// return type declaration 
+int functionName() { 
+    return 420;
+}
+
+// Return multiple values at once 
+// (C++ uses pairs [ 2 values ] and tuple [ more than 2 values ])
+// Please refer pairs and tuple respectively for more information
+std::tuple<double, double> functionName() {
+	return std::make_tuple( double1, double2 );
+}
+
+pair<double,double> result = functionName();
+std::cout << result.first << std::endl;
+std::cout << result.second << std::endl;
+
+// Pass by reference (the caller and the callee use the same variable for the parameter) 
+int functionName(int &referenceName) {}
+
+// Pass by value (the caller and callee have two independent variables with the same value)
+int functionName(int valueName) {}
+

sheets/_c++/hello

@@ -0,0 +1,13 @@
+// To install: (Mac OSX) type g++ in terminal and click enter to download the XCode Developer Tools
+               (Debian/Ubuntu) apt-get install g++
+               (Fedora/CentOS) dnf install gcc-c++
+
+// To Compile: g++ my_script.cpp
+// To Execute: ./a.out
+
+// To Compile w/ specific executable name: g++ my_script.cpp -o my.executable
+// To Execute: ./my.executable
+int main() { 
+    std::cout << "Hello" << endl;
+    return 0;
+}

sheets/_c++/loops

@@ -0,0 +1,19 @@
+// There are only 'for', 'while', and 'do while'
+
+// For loop - Outputs "0 1 2 3 4 5 6 7 8 9" 
+for( int i=0; i<10; i++ ) {
+    std::cout << i << " "; 
+}
+
+// While loop - Outputs "0 1 2 3 4 5 6 7 8 9" 
+int i = 0; 
+while( i < 10 ) { 
+    std::cout << i << " ";
+    i++;
+}
+
+// While loop - Outputs "0 " 
+int i = 0; 
+do { 
+    std::cout << i << " "; 
+}while( i<0 );

sheets/_c++/pointers

@@ -0,0 +1,8 @@
+int *int_Ptr;     		// Declare a pointer variable called iPtr pointing to an int (an int pointer)
+                		// It contains an address. That address holds an int value.
+double *double_Ptr;  	// Declare a pointer of type double.
+
+int a = 5;				// Initializes a to the integer value 5 
+int *int_Ptr = &a		// Set int_Ptr which is an int pointer to the address of a
+std::cout << int_Ptr;	// Returns the address of a 
+std::cout << *int_Ptr;	// Returns 5 because it dereference the pointer to retrieve the value of a.

sheets/_c++/structs

@@ -0,0 +1,23 @@
+// structs are like classes, but everything is by default public
+
+// Declaration 
+ObjectName structName { 
+    
+    // Declaration of variables 
+    int a; 
+    string b;
+
+    // Constructor
+    structName(new_a, new_b) { 
+        a = new_a; 
+        b = new_b; 
+    }
+
+    // Implement any public functions below
+};
+
+// Accessing PUBLIC variables 
+ObjectName v = structName(5, "Hello");              // Creates a struct via the constructor 
+std::cout << v.a << " " << v.b << std::endl;        // Prints to console "5 Hello"
+
+