/**This code is for those who are first learning about C++ data types * Comments can be found at the end of the code * HAPPY LEARNING! */ /** This program shows examples of each of the most common C++ data types, their declaration and the space they take in computer memory NOTE: The size of each variable may vary depending on the version of C++ and the machine you are using.*/ /*************** CODE ************************/ #include using namespace std; int main() { cout << "Size of char : " << sizeof(char) << endl; /* see 1 */ char c = 'g'; cout << "Example character type: " << c << endl << endl; cout << "Size of int : " << sizeof(int) << endl; int i = 12; cout << "Example integer type: " << i << endl << endl; cout << "Size of float : " << sizeof(float) << endl; float f = 22.3; cout << "Example floating point type: " << f << endl << endl; cout << "Size of double : " << sizeof(double) << endl; double d = 125.345; cout << "Example double precision type: " << d << endl << endl; cout << "Size of bool : " << sizeof(bool) << endl; bool b = false; cout << "Example bool type: " << b << endl << endl; // using size modifiers short, long cout << "Size of short int : " << sizeof(short int) << endl; /* see 2 */ short int s = 8; cout << "Example short integer type: " << s << endl << endl; cout << "Size of long int : " << sizeof(long int) << endl; /* see 3 */ long int l = 123456789; cout << "Example long integer type: " << l << endl << endl; cout << "Size of long long int : " << sizeof(long long int) << endl; /* see 4 */ long long int ll = 123456789; cout << "Example long long integer type: " << ll << endl << endl; cout << "Size of long double : " << sizeof(long double) << endl; long double dd = 12345.12345; cout << "Example long double type: " << dd << endl << endl; return 0; } /*************** COMMENTS ********************/ /* 1. All information is stored in computer memory as a string of zeros and ones. Each 0 or 1 is called a bit. A chunk of 8 bits is called a byte. sizeof(char) allows us to learn how many bytes a char variable uses in memory. Typically a char uses 1 byte = 8 bits. */ /* 2. short, long and long long can be used to reserve less or more sopace in memory for the data type. You can also apply these modifiers to double */ /* 3 Note that long int and long are equivalent. */ /* 4 long long is typically as large as long. I believe in some cases it may be larger but I have not observed that myself. Let me know if you find any additional information*/

C++ Primitive Data Types and their Memory Requirements