A "Program" ?

If you think programming is

Assembly language

So we have

High level language !

You can use human-readable code

And turn it into machine code

Let's get started!

Linux

Windows

• Not free
• closed source
• often being attacked by virus
• GUI friendly
• for general use (slides/documents/games)

Linux

• Free
• open source
• resist most virus designed for windows
• CLI friendly
• for development use (compilers/editors/...)

WannaCry ?

Linux command

vim command

PRACTICE MODE

Try it !

 // use C++ standard library
#include <iostream>

using namespace std;

// each program must have main function
int main()
{
    cout << "Hello World!" << endl;
    //use "cout" to output text to screen
    return 0;
}

Run it !

Input data

#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int number;
    cout << "Please input a number:";
    cin >> number;
    cout << "yout input is " << number << endl;

    return 0;
}

Multiple input

#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int number1, number2;
    cout << "Please input 2 number:";
    cin >> number1 >> number2;
    cout << "number1 is " << number1 << endl;
    cout << "number2 is " << number2 << endl;

    return 0;
}