Belajar pemrograman bahasa C - Input output

  Operasi Input

•     Standard library function that related to input output operations are:

scanf();

getchar();      

getch();

getche();

gets();

etc.

•   input operation : function/operation of getting the data into the memory using standard I/O devices   (keyboard, disk, etc.)  

    scanf() function

•          Header file stdio.h

•          Format:

    int scanf( const char *format [,argument]... );

•          All the argument type are pointers (the address of a variable)

•          To get the address of a variable use & sign.

•          Example  :

                                int aValue;

    scanf(”%d”,&aValue);

•          Input format: ”% type”

    where type can be substitute with one of the following list:

      scanf() function

•          scanf() function  return an integer that stated how many field are successfully assigned.

•          Example :

     int x,y,z,w;

     x=scanf("%d %d %d",&y,&z,&w);

       •          Input three values of integer 6 7 8, then x = 3; 
       •          Input four values 6 7 8 9 then x = 3 (successfully assign 3 variables y z w)

      Output operation

       To show data on the display screen / monitor. Some of standard library function in C :

      printf();

      putchar();

      putch();

      puts();

      etc.

     

      Printf() function

•          Display some data on the standard output, using certain format.

•          Standard output is the monitor.

•          syntax :

     printf(const char *format[,argument, …]);

•          Header file : stdio.h

•          Example  : (next slide)