Questions 🤔

Question

my University shoes C as the language for introducing us to developing .
we just started and I'm already in love . but there is somethings that the teacher is not explaining to wet . my curiosity is killing me so I need some answers :

scanf("%d",&a);
what does the "&" means ?
how can I work with a string ?
what does ( return 0; ) means?
what are the #include < ------> ?

THANK YOU !!!

Answer 1

& presents the address location where the value of a will be stored

Answer 2

c++ is taught here. it is derived from c but is different in many ways.
why not do the c++ course here as well. all these answers are waiting for you there :)

Answer 3

but how can we know when there is multiple variables ( how can & present every address )

Answer 4

let me correct myself, & means the address, but when you put &a, then it is the address of a, and if you have another variable b, then the &b presents the address of b, and so on

Answer 5

ohh so scanf("%d",&a) means that a int is gonna be stored in the address of a .