Dark Horse programmer--"Dark Horse video note" The use of the scanf function of C language Foundation

0. The pits that I actually encountered

If you use a standard keyboard with a Mac, you cannot enter with the scanf on the keypad, or the system will not be well recognized.

1. Basic use of scanf function

   1:  //define a variable to hold the integer entered by the user

   2:      int number;

   3:      

   4:      //The SCANF function accepts only the address of the variable

   5:      //The scanf function is a blocking function that waits for user input

   6:      //When user input is complete, the value entered by the user will be assigned to the number variable

   7:      //function call complete

   8:      scanf ("%d", &number);

2. Other usage and attention points of scanf

   1:  /* 1. Enter characters

   2:      char Myc;

   3:      

   4:      scanf ("%c", &MYC);

   5:      

   6:      printf ("Input character is%c\n", MYC);

   7:       * /

   8:      

   9:  /    * 2. Enter multiple values at once, separated by some symbols

  Ten:      int num1, num2;

  11:       

  :      scanf ("%d#%d", &num1, &num2);

  13:      

  :      printf ("num1=%d, num2=%d\n", NUM1, num2);

  :      * /

  16:      

+   /      *

3.    If the scanf parameter is separated by a space, the actual input can be delimited by a space, tab, carriage return   

  :      int num1, num2;

  :      scanf ("%d%d", &NUM1, &num2);

  :      printf ("num1=%d, num2=%d\n", NUM1, num2);

  :       * /

  23:      

  :/      *

4.SCANF   :      cannot write \ n

  :      int A;

  :      scanf ("%d\n", &a);//Wrong wording

  :      printf ("A's value is%d\n", a);

  :       * /

Dark Horse programmer--"Dark Horse video note" The use of the scanf function of C language Foundation